CVE-2026-59644

Description

In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.

References

• https://github.com/bcgit/bc-java/commit/610d8757d855afe197df0de6d831cb75c81e3b9f
• https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059644