In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery). This issue also affects Bouncy Castle for Java LTS before 2.73.12.
2026年9月4日
CVE-2026-12803 [HIGH] – In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is
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