VULNERABILITY INTELLIGENCE

CVE-2026-12803

CVSS score7.5 HIGH
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-08-03
Last modified2026-09-02
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • 91579145-5d7b-4cc5-b925-a0262ff19630: CWE-354

Primary references