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.
Metrics
Affected Vendors & Products
References
History
Mon, 03 Aug 2026 16:30:00 +0000
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| Metrics |
ssvc
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Mon, 03 Aug 2026 16:15:00 +0000
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| First Time appeared |
Legion Of The Bouncy Castle Inc.
Legion Of The Bouncy Castle Inc. bc-java Legion Of The Bouncy Castle Inc. bc-lts-java |
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| Vendors & Products |
Legion Of The Bouncy Castle Inc.
Legion Of The Bouncy Castle Inc. bc-java Legion Of The Bouncy Castle Inc. bc-lts-java |
Mon, 03 Aug 2026 06:45:00 +0000
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| References |
Mon, 03 Aug 2026 04:00:00 +0000
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| Description | 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. | |
| Title | KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery) | |
| Weaknesses | CWE-354 | |
| References |
| |
| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: bcorg
Published: 2026-08-03T02:52:20.460Z
Updated: 2026-08-03T15:22:55.531Z
Reserved: 2026-06-21T01:50:45.847Z
Link: CVE-2026-12803
Updated: 2026-08-03T15:22:49.896Z
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