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Percona Distribution for MySQL 8.4.10 using Percona XtraDB Cluster (2026-07-)

Percona Distribution for MySQL is more than just a version of MySQL; it is a comprehensive solution that combines Percona Server for MySQL with additional tools to create a cohesive environment. This distribution is reliable, scalable, and secure, ensuring that all components have been tested to work seamlessly together. You can choose from two download options: one that uses Percona Server for MySQL and another that utilizes Percona XtraDB Cluster. Refer to Install Percona Distribution for MySQL.

Percona Distribution for MySQL 8.4.9-9 was not released; 8.4.10-10 is the next build in this series. This release includes enhancements and bug fixes from MySQL 8.4.9 and MySQL 8.4.10.

This release is based on Percona XtraDB Cluster 8.4.10-10.

Release highlights

Percona Server for MySQL 8.4.10-10

Percona Server for MySQL 8.4.10-10 introduces the following new features and improvements:

  • Integrates the new Key Management Interoperability Protocol (KMIP) library into the key management component.

  • Adds JSONL (JSON Lines) output format for Audit Log Filter.

  • Increases the verbosity of the data dictionary upgrade process, making it easier to diagnose issues that occur during upgrade.

  • Logs SQL statements for the Audit Log Filter table_access class and the read and insert subclasses.

  • Flushes the audit log buffer on server shutdown when the ASYNCHRONOUS logging strategy is in use, preventing the loss of buffered events.

  • Reduces memory pressure in the Audit Log Filter component caused by VFS buffering.

  • Aligns the audit_log_filter.format=NEW output between the 8.0 plugin and the 8.4 component.

  • Optimizes performance for mem_root_deque.

This release addresses the following security vulnerabilities:

  • CVE-2026-46850: A vulnerability in MySQL Shell (Shell for VS Code) allows a low-privileged attacker with network access via HTTP to compromise MySQL Shell, with potential scope change impact on additional products (CVSS 3.1 Base Score 9.9).

  • CVE-2026-46860: A vulnerability in MySQL Router allows an unauthenticated attacker with network access via HTTP to compromise MySQL Router (CVSS 3.1 Base Score 9.8).

  • CVE-2026-46861: A vulnerability in MySQL NDB Cluster (NDB Operator) allows a low-privileged attacker with network access via HTTP to access or modify critical data, with potential scope change impact (CVSS 3.1 Base Score 9.6).

  • CVE-2026-46862: A vulnerability in MySQL Router allows an unauthenticated attacker with network access via TLS to cause a hang or repeatable unexpected exit of MySQL Router (CVSS 3.1 Base Score 7.5).

  • CVE-2026-46863: A vulnerability in MySQL Server connection handling allows an unauthenticated attacker with network access via multiple protocols to cause a hang or repeatable unexpected exit of the server (CVSS 3.1 Base Score 7.5).

  • CVE-2026-46869: A vulnerability in MySQL Shell (Dump and Load) allows an unauthenticated attacker with network access to access critical data when user interaction is required (CVSS 3.1 Base Score 6.5).

  • CVE-2026-46870: A vulnerability in MySQL Shell (Shell for VS Code) allows a low-privileged attacker with network access to compromise MySQL Shell, with potential scope change impact (CVSS 3.1 Base Score 8.5).

  • CVE-2026-46871: A vulnerability in MySQL Shell (Shell for VS Code) allows a low-privileged attacker with network access via multiple protocols to access critical data (CVSS 3.1 Base Score 6.5).

MySQL 8.4.10

Improvements and bug fixes provided by Oracle for MySQL 8.4.10 and included in Percona Server for MySQL are the following:

  • Connection attribute parsing could read a length-encoded size field before verifying that the complete field was present in the packet, leading to an out-of-bounds read. A size check is now performed before reading the field. (Bug #39116965)

  • A regression in row size estimation for ROW_FORMAT=COMPRESSED tables could cause CREATE TABLE to fail with Row size too large for tables that were accepted in earlier releases. (Bug #39129182, Bug #120323)

Find the complete list of bug fixes and changes in the MySQL 8.4.10 release notes.

Builds and packaging

  • Percona Server for MySQL releases include a mixture of PGO and non-PGO builds. Where Profile-Guided Optimization (PGO) is enabled, the compiler uses runtime profiling data from representative workloads to guide optimization, which can improve throughput and reduce latency compared with non-PGO builds.

  • See Profile-Guided Optimization (PGO) and non-PGO builds for benefits, considerations, and which build you receive for your platform.

Supplied components

Review each component’s release notes for What’s new, improvements, or bug fixes. The following is a list of the components supplied with the Percona XtraDB Cluster-based variation of the Percona Distribution for MySQL:

Component Version Description
Percona XtraBackup 8.4.0-6 An open-source hot backup utility for MySQL-based servers that doesn’t lock your database during the backup.
HAProxy 2.8.18 A high-availability and load-balancing solution for Percona XtraDB Cluster. This is a default proxy.
ProxySQL 3.0.6 A high performance, high-availability, protocol-aware proxy for MySQL.
Percona Toolkit 3.7.1-4 The set of scripts to simplify and optimize database operation.
replication_manager.sh 1.0 A tool to manage multi-source replication between multiple Percona XtraDB Cluster clusters.