Question 1

What is CVE-2026-12803 — CVE-2026-12803?

Accepted Answer

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.

Question 2

What is the authoritative source for CVE-2026-12803?

Accepted Answer

CVE-2026-12803 (CVE-2026-12803) is catalogued in NVD + CISA KEV + FIRST EPSS and curated for EU compliance use cases by SQUR.

CVE-2026-12803CVE-2026-12803

Description

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