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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-12803

KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery)

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Status
Published
Published
Updated
Assigning organization
bcorg

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Legion of the Bouncy Castle Inc. BC-JAVA

Default version status: unaffected

  • 0 to < 1.85affected
pkg:maven/org.bouncycastle/bcprov-jdk18on

Legion of the Bouncy Castle Inc. BC-LTS-JAVA

Default version status: unaffected

  • 2.73.0 to < 2.73.12affected
pkg:maven/org.bouncycastle/bcprov-lts8on

References