Redis Open-Source Edition minor version release notes - Tair (Redis® OSS-Compatible)

Tair (Redis OSS-compatible) periodically releases minor versions to add new features or fix known bugs. This topic describes the updates for each minor version of Redis Open-Source Edition. You can upgrade the minor version of your instance during off-peak hours.

Redis Open-Source Edition 7.0, 6.0, 5.0, and 4.0 are fully compatible with the corresponding Redis major versions and are backward compatible.

Important

This topic contains the minor version release notes for only Redis Open-Source Edition instances. For the minor version release notes of Tair (Enterprise Edition) instances, such as memory-optimized, persistent memory, and disk-based instances, see Tair minor version release notes.

How to check or upgrade the minor version of an instance

You can check the current version of your instance in the console. For specific operations and notes on upgrading the version, see Upgrade the minor version and proxy version.

Important

The system automatically detects the minor version of the instance. If the Minor Version Upgrade button does not exist or is not clickable, the instance is already on the latest minor version.
Because release schedules vary by region, the minor version information that is displayed in the console is the most up-to-date.

Update level descriptions

LOW: General. Includes routine feature upgrades, such as the addition of a new feature.
MEDIUM: Recommended. Includes optimizations for existing features. It also includes all updates from the LOW level.
HIGH: Important. Includes upgrades that affect stability or security, such as fixes for vulnerabilities or bugs. It also includes all updates from the LOW and MEDIUM levels.

Note

The following tables list releases after January 1, 2024. For information about releases before this date, see Historical versions.

Redis Open-Source Edition Standard Series

Redis Open-Source Edition 7.0

Minor version	Update level	Release date	Type	Description
7.0.2.5	LOW	2025-10-31	Feature optimization	The authentication system is compatible with the `auth account:password` format. Supports lightweight cluster messages to improve pub/sub performance in cluster mode. Block-type commands support redirection.
7.0.2.4	HIGH	2025-10-09	Feature optimization	Improved the stability of primary/secondary redirection. Improved the stability of cluster scale-out and scale-in.
7.0.2.4	HIGH	2025-10-09	Bug fixes	Fixed the CVE-2025-46817 security vulnerability. Fixed the CVE-2025-46818 security vulnerability. Fixed the CVE-2025-46819 security vulnerability. Fixed the CVE-2025-49844 security vulnerability.
7.0.1.19	LOW	2025-06-26	Feature optimization	Improved stability.
7.0.1.18	HIGH	2025-06-23	Feature optimization	Optimized the primary/secondary switchover process.
7.0.1.18	HIGH	2025-06-23	Bug fixes	Fixed the CVE-2025-27151 security vulnerability. Fixed the CVE-2025-32023 security vulnerability. Fixed the CVE-2025-48367 security vulnerability.
7.0.1.17	HIGH	2025-04-28	Feature optimization	Standard architecture supports the -REDIRECT redirection capability. Supports the SENTINEL masters (and master, slaves, replicas) command in Sentinel-compatible mode. Added the cmd_slowlog_count statistic.
7.0.1.17	HIGH	2025-04-28	Bug fixes	Fixed the CVE-2025-21605 security vulnerability. Fixed the CVE-2024-51741 security vulnerability. Fixed an issue where the QPS statistics for a single command were inaccurate. Fixed an issue where the source IP of commands within Lua scripts was incorrectly recorded in the audit log.
7.0.1.16	MEDIUM	2025-01-16	Security hardening	Fixed the CVE-2024-46981 security vulnerability.
7.0.1.15	LOW	2024-12-10	Feature optimization	In password-free Sentinel mode, supports configuring more password-free commands using the #no_loose_sentinel-password-free-commands parameter. Optimized the cumulative traffic and command statistics for new clients.
7.0.1.15	LOW	2024-12-10	Bug fixes	Fixed an issue where the large key statistics threshold became invalid during cluster instance scale-out or scale-in. Improved the stability of cluster instance scale-out and scale-in.
7.0.1.13	HIGH	2024-10-08	Security hardening	Fixed the CVE-2024-31228 security vulnerability. Fixed the CVE-2024-31227 security vulnerability. Fixed the CVE-2024-31449 security vulnerability. Improved stability.
7.0.1.12	LOW	2024-08-12	Feature optimization	Supports password-free configuration for Sentinel.
7.0.1.10	LOW	2024-07-23	Feature optimization	Supports EventBus event recording.
7.0.1.9	LOW	2024-06-25	Feature optimization	Optimized the execution efficiency of Pub/Sub commands to prevent stuttering when many connections stop subscribing at the same time. Optimized the client polling check policy to prevent persistent connections from failing to perform memory statistics and reclamation in time.
7.0.1.8	LOW	2024-05-28	Feature optimization	Added monitoring for connections in the WATCH or BLOCK state. Added relevant metrics for rehash operations. Upgraded the real-time hot key statistics feature. It now supports displaying precise QPS and can collect statistics on up to 50 hot keys at the same time.
7.0.1.8	LOW	2024-05-28	Bug fixes	Fixed an issue where QPS statistics were incorrect due to the use of shared objects. After the real-time hot key statistics feature is enabled, shared objects are no longer used.
7.0.1.7	LOW	2024-04-24	Feature optimization	Updated to Redis community version 7.0.15. For more information, see Redis 7.0.15 release note.
7.0.1.6	MEDIUM	2024-03-14	Feature optimization	The INFO STATS command now returns statistics for disconnections caused by exceeding client input and output buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections Added a real-time large key statistics threshold, with a default value of 2000. For example, a String type is considered a large key if its character length exceeds 2000. List, Set, and Hash types are considered large keys if their element count exceeds 2000.
7.0.1.6	MEDIUM	2024-03-14	Bug fixes	Fixed an issue where large key statistics for the Stream type were incorrect.
7.0.1.5	LOW	2024-01-09	Feature optimization	Optimized the efficiency of active expiration. Added the pubsub_clients metric to the INFO CLIENTS command.

Redis Open-Source Edition 6.0

Minor version	Update level	Release date	Type	Description
6.0.2.25	HIGH	2025-10-31	Feature optimization	The authentication system is compatible with the `auth acc:pwd` format. Optimized the throttling algorithm. Optimized the AOF rewrite method.
6.0.2.24	HIGH	2025-10-09	Bug fixes	Fixed the CVE-2025-46817 security vulnerability. Fixed the CVE-2025-46818 security vulnerability. Fixed the CVE-2025-46819 security vulnerability. Fixed the CVE-2025-49844 security vulnerability.
6.0.2.23	HIGH	2025-06-25	Bug fixes	Fixed the CVE-2025-32023 security vulnerability. Fixed the CVE-2025-48367 security vulnerability.
6.0.2.22	MEDIUM	2025-06-05	Feature optimization	Optimized the primary/secondary switchover process.
6.0.2.22	MEDIUM	2025-06-05	Bug fixes	Fixed an issue where large key statistics were incorrect after a cluster scale-out.
6.0.2.21	HIGH	2025-04-28	Feature optimization	Allows the READONLY and READWRITE commands to be executed when the instance is in the Loading state. Supports the SENTINEL masters (and master, slaves, replicas) command in Sentinel-compatible mode.
6.0.2.21	HIGH	2025-04-28	Bug fixes	Fixed a data access exception that occurred during cluster instance scale-out and scale-in. This affects versions 0.2.16 to 0.2.18. Fixed the CVE-2025-21605 security vulnerability. Fixed an issue where some error messages were missing from Errorstats, mainly involving -WRONGTYPE errors.
6.0.2.18	HIGH	2025-01-16	Bug fixes	Fixed an issue where the SRANDMEMBER command could potentially cause an infinite loop in the instance. Fixed the CVE-2024-46981 security vulnerability. Fixed an issue where the QPS statistics for a single command were inaccurate.
6.0.2.17	LOW	2024-12-10	Feature optimization	In password-free Sentinel mode, supports configuring more password-free commands using the #no_loose_sentinel-password-free-commands parameter. Optimized the cumulative traffic and command statistics for new clients.
6.0.2.17	LOW	2024-12-10	Bug fixes	Fixed an issue where the large key statistics threshold became invalid during cluster instance scale-out or scale-in. Improved the stability of cluster instance scale-out and scale-in.
6.0.2.15	HIGH	2024-10-08	Security hardening	Fixed the CVE-2024-31228 security vulnerability. Fixed the CVE-2024-31449 security vulnerability.
6.0.2.14	LOW	2024-08-12	Feature optimization	Supports password-free configuration for Sentinel.
6.0.2.12	LOW	2024-07-23	Feature optimization	Optimized the whitelist check logic when both the VPC password-free feature and the #no_loose_check-whitelist-always parameter are enabled. The latency insight feature now supports monitoring for pipelines.
6.0.2.12	LOW	2024-07-23	Bug fixes	Fixed an issue where the execution duration statistics for commands within Lua and MULTI were incorrect. This affects versions 6.0.2.8 to 6.0.2.11.
6.0.2.11	LOW	2024-06-25	Feature optimization	The execution efficiency of Pub/Sub commands is optimized to prevent stuttering that occurs when a large number of users unsubscribe from channels at the same time. The client polling mechanism is optimized to prevent a failure to promptly collect memory statistics and reclaim unused memory for long-lived connections. The method used by child processes to save Redis Database (RDB) files and append-only files (AOFs) to disks is optimized.
6.0.2.10	LOW	2024-05-28	Security hardening	Improved stability.
6.0.2.9	LOW	2024-05-28	Feature optimization	Added monitoring for connections in the WATCH or BLOCK state. Added relevant metrics for rehash operations. Upgraded the real-time hot key statistics feature. It now supports displaying precise QPS and can collect statistics on up to 50 hot keys at the same time.
6.0.2.9	LOW	2024-05-28	Bug fixes	Fixed an issue where QPS statistics were incorrect due to the use of shared objects. After the real-time hot key statistics feature is enabled, shared objects are no longer used.
6.0.2.8	LOW	2024-04-24	Feature optimization	Updated to Redis community version 6.0.20. For more information, see Redis 6.0.20 release note.
6.0.2.7	LOW	2024-03-14	Feature optimization	The INFO STATS command now returns statistics for disconnections caused by exceeding client input and output buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections Added a real-time large key statistics threshold, with a default value of 2000. For example, a String type is considered a large key if its character length exceeds 2000. List, Set, and Hash types are considered large keys if their element count exceeds 2000.
6.0.2.6	LOW	2024-01-09	Feature optimization	Optimized the efficiency of active expiration. The INFO CLIENTS command now includes the pubsub_clients metric. Optimized the execution efficiency of the CLUSTER NODES and CLUSTER SLOTS commands.

Redis Open-Source Edition 5.0

Note

Redis Open-Source Edition 5.0 instances support the cloud-native and classic deployment modes. In the Minor Version column of the following table, the minor version numbers for classic instances are enclosed in parentheses.

Minor version	Update level	Release date	Type	Description
5.5.2.25 (5.2.25)	HIGH	2025-10-31	Feature optimization	The authentication system is compatible with the `auth acc:pwd` format. Optimized the throttling algorithm. Optimized the AOF rewrite method.
5.5.2.24 (5.2.24)	HIGH	2025-10-09	Bug fixes	Fixed the CVE-2025-46817 security vulnerability. Fixed the CVE-2025-46818 security vulnerability. Fixed the CVE-2025-46819 security vulnerability. Fixed the CVE-2025-49844 security vulnerability.
5.5.2.23 (5.2.23)	HIGH	2025-06-25	Bug fixes	Fixed the CVE-2025-32023 security vulnerability. Fixed the CVE-2025-48367 security vulnerability.
5.5.2.22 (5.2.22)	MEDIUM	2025-06-05	Feature optimization	Optimized the primary/secondary switchover process.
5.5.2.22 (5.2.22)	MEDIUM	2025-06-05	Bug fixes	Fixed an issue where large key statistics were incorrect after a cluster scale-out.
5.5.2.21 (5.2.21)	HIGH	2025-04-28	Feature optimization	Allows the READONLY and READWRITE commands to be executed when the instance is in the Loading state. Supports the SENTINEL masters (and master, slaves, replicas) command in Sentinel-compatible mode.
5.5.2.21 (5.2.21)	HIGH	2025-04-28	Bug fixes	Fixed a data access exception that occurred during cluster instance scale-out and scale-in. This affects versions 5.2.17 to 5.2.18. Fixed the CVE-2025-21605 security vulnerability. Fixed an issue where some error messages were missing from Errorstats, mainly involving -WRONGTYPE errors.
5.5.2.18 (5.2.18)	HIGH	2025-01-16	Bug fixes	Fixed an issue where the SRANDMEMBER command could potentially cause an infinite loop in the instance. Fixed the CVE-2024-46981 security vulnerability. Fixed an issue where the QPS statistics for a single command were inaccurate.
5.5.2.17 (5.2.17)	LOW	2024-12-10	Feature optimization	Optimized the cumulative traffic and command statistics for new clients.
5.5.2.17 (5.2.17)	LOW	2024-12-10	Bug fixes	Fixed an issue where the large key statistics threshold became invalid during cluster instance scale-out or scale-in. Improved the stability of cluster instance scale-out and scale-in.
5.5.2.15 (5.2.15)	HIGH	2024-10-08	Security hardening	Fixed the CVE-2024-31228 security vulnerability. Fixed the CVE-2024-31449 security vulnerability.
5.5.2.13 (5.2.13)	LOW	2024-08-21	Feature optimization	Compatible with authentication using an incorrect password after the VPC password-free feature is enabled.
5.5.2.12 (5.2.12)	LOW	2024-07-23	Feature optimization	Optimized the whitelist check logic when both the VPC password-free feature and the #no_loose_check-whitelist-always parameter are enabled. The latency insight feature now supports monitoring for pipelines. Compatible with Redis community version 5.0.14.
5.5.2.12 (5.2.12)	LOW	2024-07-23	Bug fixes	Fixed an issue where the execution duration statistics for commands within Lua and MULTI were incorrect. This affects versions 5.2.8 to 5.2.11.
5.5.2.11 (5.2.11)	LOW	2024-06-25	Feature optimization	The execution efficiency of Pub/Sub commands is optimized to prevent stuttering that occurs when a large number of users unsubscribe from channels at the same time. The client polling mechanism is optimized to prevent a failure to promptly collect memory statistics and reclaim unused memory for long-lived connections. The method used by child processes to save Redis Database (RDB) files and append-only files (AOFs) to disks is optimized.
5.5.2.10 (5.2.10)	LOW	2024-05-28	Security hardening	Improved stability.
5.5.2.9 (5.2.9)	LOW	2024-05-28	Feature optimization	Added monitoring for connections in the WATCH or BLOCK state. Added relevant metrics for rehash operations. Upgraded the real-time hot key statistics feature. It now supports displaying precise QPS and can collect statistics on up to 50 hot keys at the same time.
5.5.2.9 (5.2.9)	LOW	2024-05-28	Bug fixes	Fixed an issue where QPS statistics were incorrect due to the use of shared objects. After the real-time hot key statistics feature is enabled, shared objects are no longer used.
5.5.2.8 (5.2.8)	LOW	2024-04-24	Security hardening	Improved stability.
5.5.2.7 (5.2.7)	LOW	2024-03-14	Feature optimization	The INFO STATS command now returns statistics for disconnections caused by exceeding client input and output buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections Added a real-time large key statistics threshold, with a default value of 2000. For example, a String type is considered a large key if its character length exceeds 2000. List, Set, and Hash types are considered large keys if their element count exceeds 2000.
5.5.2.6 (5.2.6)	LOW	2024-01-09	Feature optimization	Optimized the efficiency of active expiration. The INFO CLIENTS command now includes the pubsub_clients metric. Optimized the execution efficiency of the CLUSTER NODES and CLUSTER SLOTS commands.
5.0.5.20 (0.5.20)	HIGH	2025-01-16	Security hardening	Fixed the CVE-2024-46981 security vulnerability.

Redis Open-Source Edition 4.0

Minor version	Update level	Release date	Type	Description
1.9.20	HIGH	2025-10-31	Feature optimization	Optimized the throttling algorithm.
1.9.19	HIGH	2025-10-09	Bug fixes	Fixed the CVE-2025-46817 security vulnerability. Fixed the CVE-2025-46818 security vulnerability. Fixed the CVE-2025-46819 security vulnerability. Fixed the CVE-2025-49844 security vulnerability.
1.9.18	HIGH	2025-01-16	Security hardening	Fixed the CVE-2024-46981 and CVE-2024-31449 security vulnerabilities.

Historical versions

The following tables list the release records for minor versions that were released before January 1, 2024.

Redis Open-Source Edition 7.0 historical release records

Minor version	Update level	Release date	Type	Description
7.0.1.4	HIGH	2023-11-15	Feature optimization	Updated to Redis community version 7.0.14. For more information, see Redis 7.0.14 release note.
7.0.1.4	HIGH	2023-11-15	Security hardening	Fixed the CVE-2023-41056 security vulnerability. Fixed the CVE-2023-41053 security vulnerability.
7.0.1.3	LOW	2023-08-28	Feature optimization	Optimized the instance scale-out and scale-in process. Cluster instances support multi-zone disaster recovery deployment.
7.0.1.2	HIGH	2023-08-01	New features	Cluster architecture instances in direct connection mode support the TLS encryption feature. Cluster architecture instances in proxy mode support the IP pass-through feature, which you can control with the ptod_enabled parameter. The SPUBLISH command for cluster architecture instances supports intra-shard broadcasting.
7.0.1.2	HIGH	2023-08-01	Feature optimization	Updated to Redis community version 7.0.12. This includes multiple performance optimizations and security vulnerability fixes, such as for CVE-2022-24834 and CVE-2023-36824. For more information, see Redis 7.0.12 release note.
7.0.1.1	LOW	2023-07-17	Feature optimization	Optimized the primary/secondary switchover and restart processes for cluster architecture instances.
7.0.1.0	LOW	2023-04-20	New features	Supports the sale of cluster architecture and read/write splitting architecture. Supports smooth scaling for the cluster architecture. Periodically prints hot key information to the audit log for troubleshooting.
7.0.0.6	LOW	2023-01-31	New features	Supports Audit Logs. Supports Top Key Statistics. Supports Latency Insights.
7.0.0.5	LOW	2022-07-21	Feature optimization	Updated to Redis community version 7.0.4.
7.0.0.4	LOW	2022-06-20	Feature optimization	Updated to Redis community version 7.0.2.
7.0.0.3	LOW	2022-05-27	First release	First release of Redis Open-Source Edition 7.0 for disk-based instances. For more information, see Redis 7.0 release notes.

Redis Open-Source Edition 6.0 historical release records

Minor version	Update level	Release date	Type	Description
6.0.2.5	LOW	2023-08-28	Feature optimization	Added replication traffic statistics, which are displayed separately in INFO STATS.
6.0.2.4	HIGH	2023-08-21	Feature optimization	Cluster architecture instances in direct connection mode support the TLS encryption feature.
6.0.2.4	HIGH	2023-08-21	Security hardening	Fixed the CVE-2022-24834 security vulnerability.
6.0.2.3	MEDIUM	2023-07-17	Security hardening	Optimized the primary/secondary switchover and restart processes for cluster architecture instances.
6.0.2.1	MEDIUM	2023-06-30	Security hardening	Improved the stability of the cluster architecture.
6.0.2.0	HIGH	2023-04-24	Feature optimization	Periodically prints hot key information to the audit log for troubleshooting. The ptod_enabled parameter now controls both performance monitoring and slow query log features.
6.0.2.0	HIGH	2023-04-24	Security hardening	Fixed several bugs related to cluster architecture scale-out and scale-in under extreme scenarios.
6.0.1.24	LOW	2022-11-14	Security hardening	Improved stability.
6.0.1.23	LOW	2022-09-20	Feature optimization	The audit log now records expiration and deletion events. The audit log no longer records non-write commands such as PING, AUTH, and SELECT.
6.0.1.22	LOW	2022-09-13	Feature optimization	Optimized the handling process after a cluster architecture instance runs out of connections.
6.0.1.21	LOW	2022-08-30	Feature optimization	Optimized the startup process for cluster architecture instances.
6.0.1.20	LOW	2022-06-28	Feature optimization	Fixed an issue where commands such as ZUNIONSTORE and ZINTERSTORE caused errors in cluster proxy mode.
6.0.1.19	LOW	2022-06-22	Feature optimization	Optimized the latency statistics histogram. For more information, see Latency Insight.
6.0.1.19	LOW	2022-06-22	Security hardening	Upgraded and optimized the process for adding and deleting nodes in a cluster architecture. For more information, see Adjust the number of shards in a cluster.
6.0.1.18	LOW	2022-05-17	Feature optimization	Deleted the Errorstats - Selected field from the INFO command return value.
6.0.1.17	LOW	2022-05-10	Feature optimization	Cluster architecture supports the MOVE command.
6.0.1.16	MEDIUM	2022-04-25	Security hardening	Optimized the process for adding and deleting nodes in a cluster architecture to improve stability.
6.0.1.15	LOW	2022-03-24	New features	Supports latency statistics histogram. For more information, see Latency Insight. The INFO command can return Errorstats (Redis error statistics) information.
6.0.1.14	LOW	2022-02-21	Feature optimization	Supports the READONLY and READWRITE commands. For more information, see Supported commands for Redis Open-Source Edition.
6.0.1.13	LOW	2022-01-14	Feature optimization	Added a metric for DB metadata memory usage. Optimized the real-time Top Key statistics feature.
6.0.1.12	HIGH	2021-10-26	Security hardening	Fixed an issue with excessive slow query logs during cluster configuration changes to improve stability.
6.0.1.11	HIGH	2021-10-13	Feature optimization	Enhanced the autonomous capability for smooth slot migration during cluster configuration changes. Optimized the performance of commands such as CLUSTER NODES. Optimized the whitelist feature.
6.0.1.10	HIGH	2021-09-06	Feature optimization	Improved stability.
6.0.1.9	MEDIUM	2021-08-16	Feature optimization	Enhanced the reliability of smooth slot migration to improve stability.
6.0.1.8	MEDIUM	2021-08-06	Feature optimization	Improved stability.
6.0.1.7	MEDIUM	2021-08-06	Feature optimization	Improved stability.
6.0.1.6	MEDIUM	2021-07-19	New features	Merged updates from community version 6.0.14. For more information, see Redis 6.0 release notes.
6.0.1.6	MEDIUM	2021-07-19	Feature optimization	Optimized the process of deleting source slot data after slot data migration is complete to improve data reliability. Simplified the incremental data synchronization process for slot data migration.
6.0.1.5	MEDIUM	2021-06-04	Feature optimization	Improved stability.
6.0.1.4	MEDIUM	2021-05-27	Feature optimization	Improved stability.
6.0.1.3	LOW	2021-05-18	New features	Supports real-time statistics for big keys.
6.0.1.2	MEDIUM	2021-05-07	Feature optimization	Improved stability.
6.0.1.1	MEDIUM	2020-11-28	New features	Merged updates from community version 6.0.9. For more information, see Redis 6.0 release notes. Supports smooth slot migration. Supports obtaining a virtual IP address (VIP) over the Internet to provide better support for clients that use the direct connection mode.
6.0.1.1	MEDIUM	2020-11-28	Feature optimization	Optimized the instance health check capability to speed up primary/secondary switchover during disk jitter.
6.0.0.5	HIGH	2020-08-21	Bug fixes	Fixed an issue where hot key statistics were inaccurate.
6.0.0.4	HIGH	2020-07-20	Bug fixes	Fixed an issue where some parameter settings became invalid after a restart. Fixed an issue where the secondary database flag in the slow query log was incorrect.
6.0.0.3	LOW	2020-06-11	New features	Merged updates from community version 6.0.5. For more information, see Redis 6.0 release notes. In the return value of the INFO command, the Replication section now displays role information (for example, `role:master`). This is compatible with calls to this information by Redisson clients in some scenarios. Supports QPS statistics for read and write commands. For more information, see View performance monitoring.
6.0.0.2	LOW	2020-06-02	New features	Merged updates from community version 6.0.4. For more information, see Redis 6.0 release notes.
6.0.0.1	LOW	2020-05-06	First release	First minor version release, based on community version 6.0.1. For more information, see Redis 6.0 release notes.

Redis Open-Source Edition 5.0 historical release records

Minor version	Update level	Release date	Type	Description
5.2.5	LOW	2023-08-28	Feature optimization	Added replication traffic statistics, which are displayed separately in INFO STATS.
5.2.4	HIGH	2023-08-21	Feature optimization	Cluster architecture instances in direct connection mode support the TLS encryption feature.
5.2.4	HIGH	2023-08-21	Security hardening	Fixed the CVE-2022-24834 security vulnerability.
5.2.2	MEDIUM	2023-07-17	Security hardening	Optimized the primary/secondary switchover and restart processes for cluster architecture instances.
5.2.1	MEDIUM	2023-06-30	Security hardening	Improved the stability of the cluster architecture.
5.2.0	HIGH	2023-04-24	Feature optimization	Periodically prints hot key information to the audit log for troubleshooting. The ptod_enabled parameter now controls both performance monitoring and slow query log features.
5.2.0	HIGH	2023-04-24	Security hardening	Fixed several bugs related to cluster architecture scale-out and scale-in under extreme scenarios.
5.1.13	LOW	2022-11-14	Security hardening	Improved stability.
5.1.12	LOW	2022-09-20	Feature optimization	The audit log now records expiration and deletion events. The audit log no longer records non-write commands such as PING, AUTH, and SELECT.
5.1.11	LOW	2022-09-06	Feature optimization	Optimized the handling process after a cluster architecture instance runs out of connections.
5.1.10	LOW	2022-08-23	Feature optimization	Optimized the startup process for cluster architecture instances. Optimized the latency statistics histogram.
5.1.9	LOW	2022-06-22	Feature optimization	Optimized the latency statistics histogram. For more information, see Latency Insight.
5.1.9	LOW	2022-06-22	Security hardening	Upgraded and optimized the process for adding and deleting nodes in a cluster architecture. For more information, see Adjust the number of shards in a cluster.
5.1.8	LOW	2022-05-17	Feature optimization	Deleted the Errorstats - Selected field from the INFO command return value.
5.1.7	LOW	2022-05-06	Feature optimization	Cluster architecture supports the MOVE command.
5.1.6	MEDIUM	2022-04-25	Feature optimization	Optimized the process for adding and deleting nodes in a cluster architecture to improve stability.
5.1.5	LOW	2022-04-13	Feature optimization	Improved stability.
5.1.4	LOW	2022-03-24	New features	Supports latency statistics histogram. For more information, see Latency Insight. The INFO command can return Errorstats (Redis error statistics) information.
5.1.3	LOW	2022-02-21	Feature optimization	Supports the READONLY and READWRITE commands. For more information, see Supported commands for Redis Open-Source Edition.
5.1.1	LOW	2022-01-04	Feature optimization	Added a metric for DB metadata memory usage.
5.0.9	LOW	2021-12-22	Feature optimization	Optimized the real-time Top Key statistics feature.
5.0.8	LOW	2021-11-15	Feature optimization	Supports smooth scale-out and scale-in for cluster instances. Account names are case-sensitive.
0.5.19	HIGH	2023-08-15	Security hardening	Fixed the CVE-2022-24834 security vulnerability.
0.5.18	LOW	2022-08-23	Feature optimization	Optimized the startup process for cluster architecture instances.
0.5.17	HIGH	2022-06-07	Security hardening	Improved stability.
0.5.16	HIGH	2022-05-23	Security hardening	Improved the stability of configuration changes for cluster architecture instances after direct connection access is enabled.
0.5.15	HIGH	2022-04-25	Security hardening	Fixed a potential failure when migrating large keys during configuration changes for cluster architecture instances after direct connection access is enabled.
0.5.14	LOW	2022-01-04	Feature optimization	Added a metric for DB metadata memory usage.
0.5.12	LOW	2021-11-29	Feature optimization	Fixed an issue where cluster instances failed to restart under abnormal conditions.
0.5.11	LOW	2021-11-24	Feature optimization	Fixed an issue where the real-time key analysis feature missed statistics for the Spop command.
0.5.10	HIGH	2021-10-26	Security hardening	Fixed an issue with excessive slow query logs during cluster configuration changes to improve stability.
0.5.9	HIGH	2021-10-15	Security hardening	Improved stability.
0.5.8	MEDIUM	2021-10-13	Feature update	Enhanced the autonomous capability for smooth slot migration during cluster configuration changes.
0.5.7	LOW	2021-08-26	New features	Subdivided Queries Per Second (QPS) statistics. Now supports statistics for read, write, and other operations.
0.5.6	HIGH	2021-08-16	Bug fixes	Enhanced the reliability of smooth slot migration to improve stability.
0.5.5	HIGH	2021-08-05	Bug fixes	Fixed a potential failure during configuration changes for cluster instances with direct connection enabled.
0.5.4	MEDIUM	2021-07-27	Feature update	Improved stability.
0.5.3	MEDIUM	2021-07-21	Feature update	Optimized the process of deleting source data after data migration is complete to improve data reliability. Simplified the incremental data synchronization process for data migration.
0.5.2	HIGH	2021-04-26	Security hardening	Mainly addresses security vulnerabilities in the community Lua JIT.
0.5.2	HIGH	2021-04-26	New features	Optimized slot migration capability, allowing disk-based instances to achieve lossless scale-out and scale-in. Supports real-time statistics for big keys. Supports obtaining a virtual IP address (VIP) over the Internet to provide better support for users of direct connection addresses.
0.5.0	MEDIUM	2021-03-25	New features	Supports smooth slot migration.
0.5.0	MEDIUM	2021-03-25	Feature optimization	Improved stability when handling many asynchronous client requests.
0.4.0	MEDIUM	2021-03-09	New features	Supports real-time statistics for big keys. Supports the CONFIG RESETSTAT command. When an `illegal address` error message is returned, Redis includes the current client's IP address in the error message. You can use this information to set the correct IP whitelist for the Redis instance. Figure 1. IP address prompt
0.4.0	MEDIUM	2021-03-09	Feature optimization	Optimized the instance health check capability to speed up primary/secondary switchover during disk jitter.
0.3.10	HIGH	2020-09-25	Bug fixes	Fixed an issue where the return value of the CLUSTER NODES command was inconsistent with the open-source protocol, where slots were separated by spaces. This prevents client parsing errors.
0.3.9	LOW	2020-07-20	New features	Supports the ECS security group feature. You can quickly grant permissions by attaching the security group of an ECS instance to the Redis instance without manually entering the IP address of the ECS instance. This improves O&M efficiency. For more information, see Configure a whitelist using an ECS security group.
0.3.8	HIGH	2020-07-14	Feature optimization	The CLIENT UNBLOCK subcommand is now available.
0.3.8	HIGH	2020-07-14	Bug fixes	Fixed an issue where parsing the expiration time was incorrect when migrating a slot. Corrected the latency flag in the audit log to prevent confusion in primary and secondary audit logs.
0.3.7	HIGH	2020-06-17	Bug fixes	Fixed an issue where the IP address returned in direct connection mode was unreachable.
0.3.6	LOW	2020-06-09	New features	In the return value of the INFO command, the Replication section now displays role information (for example, `role:master`). This is compatible with calls to this information by Redisson clients in some scenarios.
0.3.5	LOW	2020-06-05	New features	Supports QPS statistics for read and write commands. For more information, see View performance monitoring.
0.3.4	HIGH	2020-04-08	Bug fixes	Fixed a crash issue that could occur when a hot key is evicted. Fixed a crash issue caused by Use-After-Free (UAF) when the audit log is disabled.
0.3.1	HIGH	2020-02-20	New features	Supports the audit log feature, which provides log query, online analysis, and export functions. For more information, see Audit Log. Supports direct connection mode. Clients can connect through a direct connection address to bypass the proxy. The connection method is similar to connecting to a native Redis cluster, which reduces link overhead and further improves the response speed of the Redis service. For more information, see Enable direct connection. Supports requesting a public endpoint when password-free access in a VPC is enabled. Added a statistical scenario for `oom_err_count` in the INFO command: it is counted when the maxmemory data volume exceeds the set value.
0.3.1	HIGH	2020-02-20	Bug fixes	Fixed a crash issue caused by the expiration mechanism during the execution of the RPOPLPUSH command when the source and destination are the same. Fixed a permission authentication error in VPC password-free mode.
0.2.0	LOW	2020-01-17	New features	Supports real-time hot key statistics to help you quickly identify hot keys in your instance. For more information, see Top Key Statistics.
0.1.2	LOW	2019-11-26	New features	Supports executing read-only Lua scripts on read-only nodes of read/write splitting instances.
Before 0.1.2	N/A	N/A	N/A	Early minor versions of version 5.0. We recommend that you upgrade to the latest minor version.

Redis Open-Source Edition 4.0 historical release records

Minor version	Update level	Release date	Type	Description
1.9.17	LOW	2023-11-25	Security hardening	Improved stability.
1.9.16	LOW	2023-08-15	Security hardening	Improved stability.
1.9.15	LOW	2023-05-17	Feature optimization	For cluster architecture instances, you can now view the number of connections from proxy nodes to data nodes in the CloudMonitor console.
1.9.14	LOW	2022-11-14	Feature optimization	Optimized performance statistics.
1.9.13	LOW	2022-08-23	Feature optimization	Optimized the startup process for cluster architecture instances.
1.9.12	HIGH	2022-06-07	Security hardening	Improved stability.
1.9.10	HIGH	2022-05-23	Security hardening	Improved the stability of configuration changes for cluster architecture instances after direct connection access is enabled.
1.9.9	HIGH	2022-04-25	Security hardening	Improved stability.
1.9.8	HIGH	2022-04-25	Security hardening	Fixed a potential failure when migrating large keys during configuration changes for cluster architecture instances after direct connection access is enabled.
1.9.6	HIGH	2021-10-15	Security hardening	Improved stability.
1.9.5	LOW	2021-09-13	New features	Subdivided Queries Per Second (QPS) statistics. Now supports statistics for read, write, and other operations.
1.9.4	HIGH	2021-08-05	Bug fixes	Fixed a potential failure during configuration changes for cluster instances with direct connection enabled.
1.9.3	MEDIUM	2021-07-20	Feature update	Improved stability.
1.9.2	HIGH	2021-04-19	Security hardening	Mainly addresses security vulnerabilities in the community Lua JIT.
1.9.2	HIGH	2021-04-19	New features	Supports obtaining a virtual IP address (VIP) over the Internet to provide better support for users of direct connection addresses.
1.9.1	MEDIUM	2021-03-08	Feature optimization	Optimized the instance health check capability to speed up primary/secondary switchover during disk jitter. Optimized the ability of large-memory instances to execute BGSAVE and REWRITE through fork to avoid potential long pauses.
1.9.0	LOW	2021-02-22	New features	When an `illegal address` error message is returned, Redis includes the current client's IP address in the error message. You can use this information to set the correct IP whitelist for the Redis instance. Figure 2. IP address prompt
1.8.8	HIGH	2020-09-25	Bug fixes	Fixed an issue where the return value of the CLUSTER NODES command was inconsistent with the open-source protocol, where slots were separated by spaces. This prevents client parsing errors.
1.8.7	LOW	2020-07-20	New features	Supports the ECS security group feature. You can quickly grant permissions by attaching the security group of an ECS instance to the Redis instance without manually entering the IP address of the ECS instance. This improves O&M efficiency. For more information, see Configure a whitelist using an ECS security group.
1.8.6	HIGH	2020-07-14	Bug fixes	Corrected the latency flag in the audit log to prevent confusion in primary and secondary audit logs.
1.8.5	LOW	2020-06-09	New features	In the return value of the INFO command, the Replication section now displays role information (for example, `role:master`). This is compatible with calls to this information by Redisson clients in some scenarios.
1.8.4	LOW	2020-06-05	New features	Supports QPS statistics for read and write commands. For more information, see View performance monitoring.
1.8.3	HIGH	2020-04-08	Bug fixes	Fixed a crash issue that could occur when a hot key is evicted. Fixed a crash issue caused by Use-After-Free (UAF) when the audit log is disabled.
1.8.1	LOW	2020-02-20	New features	Supports requesting a public endpoint when password-free access in a VPC is enabled.
1.8.0	HIGH	2020-01-16	New features	Supports real-time hot key statistics to help you quickly identify hot keys in your instance. For more information, see Top Key Statistics.
1.8.0	HIGH	2020-01-16	Bug fixes	In the direct connection scenario, fixed an issue where the return information of the INFO command now includes cluster_enabled information, allowing some SDKs to correctly negotiate to cluster mode.
1.7.1	MEDIUM	2019-11-20	New features	Supports executing read-only Lua scripts on read-only nodes of read/write splitting instances. Supports direct connection mode. Clients can connect through a direct connection address to bypass the proxy, similar to connecting to a native Redis cluster. This reduces link overhead and further improves the response speed of the Redis service. For more information, see Enable direct connection. In the return information of the INFO command, the Memory section now includes statistics on Lua script memory usage.
1.7.1	MEDIUM	2019-11-20	Feature optimization	Optimized memory usage for the audit log.
1.5.8	HIGH	2019-09-23	Bug fixes	Fixed an issue where the atomicity of SETEX was broken during two-way synchronization in older Global Distributed Cache links.
1.5.6	HIGH	2019-08-28	New features	The audit log supports recording latency events.
1.5.6	HIGH	2019-08-28	Bug fixes	Fixed an issue where slow requests caused by commands such as KEYS, FLUSHALL, and FLUSHDB initiated by the client could trigger a primary/secondary switchover.
1.5.4	LOW	2019-07-08	New features	Supports the audit log feature, which provides log query, online analysis, and export functions. For more information, see Audit Log. Records latency for the entire event loop to help you understand the state of the DPI engine.
1.5.2	HIGH	2019-07-04	Bug fixes	Fixed a crash triggered by the expiration mechanism during an RPOPLPUSH command when the source and destination were the same.
1.4.0	HIGH	2019-05-15	Bug fixes	Fixed a bug that triggered a primary/standby switchover when an instance restarted and began to load an RDB or AOF file.
Before 1.4.0	Not applicable	Not applicable	Not applicable	For early minor versions of 4.0, upgrade to the latest minor version.

References

For the release notes of proxy nodes, see Proxy minor version release notes.
For the release notes of Tair (Enterprise Edition), see Tair minor version release notes.