CVE-2026-12816

Description

In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

References

• https://github.com/bcgit/bc-java/commit/6d9e4bbaee9409713ada167e5f901554cbb084ac
• https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012816