Unrated severityOSV Advisory· Published Aug 4, 2026

Debian bouncycastle: In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via len…

CVE-2026-12816

Description

In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

Affected products

Legion Of The Bouncy Castle Inc./Bc Lts JavaOSV
Range: r2rv73dot11, r2rv73dot10, r2rv73dot9, …
Debian/bouncycastlellm-fuzzy
Range: <1.85, <2.73.12
Legion Of The Bouncy Castle Inc./Bouncy Castle for Javallm-fuzzy
Range: <1.85, <2.73.12

Patches

Vulnerability mechanics

News mentions

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epss	0.000
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patch	-0.070
ransomware	0.000