Cassandra 5.0.8

Overview

Apache Cassandra 5.0.8, released April 16, 2026, is a patch release for the 5.0 GA line. This release primarily backports the Automated Repair Inside Cassandra feature (CEP-37) from the upcoming 6.0 branch and includes several security and tooling updates.

New Features

• Backport of CEP-37 — Automated Repair Inside Cassandra (CASSANDRA-21138) — The Unified Repair Solution is now available on the 5.0 branch. This feature automates repair management by running incremental repairs as a background process with minimal operator intervention. Operators no longer need external cron jobs or third-party repair orchestration tools for routine consistency maintenance.
• TLS 1.3 Auto-Negotiation in cassandra-stress — The benchmarking tool now supports TLS 1.3 by default with automatic protocol version negotiation. This aligns cassandra-stress with production deployment best practices and enables more realistic performance testing on modern infrastructure.

Bug Fixes

• Multiple compaction-related edge cases resolved to improve write throughput stability
• Improved handling of hinted handoff under high write loads, reducing the risk of data loss during node recovery
• Read repair consistency checks are now more efficient for large clusters with hundreds of nodes
• Stability improvements in the gossip protocol under network partition scenarios
• Several CVE fixes addressing denial-of-service vectors in the native transport protocol

Upgrade Notes

Cassandra 5.0.8 is a drop-in replacement for 5.0.x. Rolling upgrades are supported following the standard procedure: upgrade one node at a time, verify node health with nodetool status before proceeding to the next. For clusters running Cassandra 4.x, a major version upgrade to 5.0 is required first before applying this patch.