CVE-2026-12803
High · 7.5CVSS
7.5
EPSS
0.2%
Published
Aug 3, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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