- Fixed numerous bugs across InnoDB, JSON, optimizer, replication, X Plugin, Clone plugin, LOAD DATA handling, memory management, keyword definitions, and server start on Oracle/Red Hat Linux 9.
- Deprecated replication variables group_replication_communication_stack and group_replication_ip_allowlist, scheduled for removal.
- Upgraded libfido2 to version 1.17.0 and enhanced memory handling for large‑scale upgrades.
Changes in MySQL 8.4.11 (2026-07-28)
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Introduces the Change Stream Applier (CSA) as an opt‑in, per‑channel multi‑threaded replication applier with configurable worker threads (up to 1,024) replacing the MTA.
Fixed a large number of bugs across InnoDB, JSON handling, optimizer, replication, performance schema, X plugin, Clone plugin, and other components, including memory leaks and incorrect keyword classifications.
Critical security patch addressing multiple vulnerabilities