Bug 2510260 (CVE-2026-12803) - CVE-2026-12803 org.bouncycastle/bc-java: Bouncy Castle for Java: Authenticated Encryption Forgery Vulnerability
Summary: CVE-2026-12803 org.bouncycastle/bc-java: Bouncy Castle for Java: Authenticate...
Keywords:
Status: NEW
Alias: CVE-2026-12803
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-03 04:01 UTC by OSIDB Bzimport
Modified: 2026-09-23 03:01 UTC (History)
87 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-03 04:01:38 UTC 
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.
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