PT-2026-67016 · Unknown · Bouncy Castle For Java
CVE-2026-12803
·
Published
2026-08-03
·
Updated
2026-08-10
CVSS v4.0
8.7
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber |
Name of the Vulnerable Software and Affected Versions
Bouncy Castle for Java versions prior to 1.85
Bouncy Castle for Java LTS versions prior to 2.73.12
Description
The
KCCMBlockCipher MAC does not bind the nonce when Additional Authenticated Data (AAD) is absent, which allows for cross-nonce AEAD forgery. AEAD (Authenticated Encryption with Associated Data) is a form of encryption that simultaneously provides confidentiality and authenticity of the data.Recommendations
Update Bouncy Castle for Java to version 1.85 or later.
Update Bouncy Castle for Java LTS to version 2.73.12 or later.
Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Bouncy Castle For Java