Bug 2510259 (CVE-2026-12816) - CVE-2026-12816 org.bouncycastle/bcprov-jdk15on: Bouncy Castle for Java: Message Authentication Code (MAC) forgery due to a length-dependent Key Derivation Function (KDF) split
Summary: CVE-2026-12816 org.bouncycastle/bcprov-jdk15on: Bouncy Castle for Java: Messa...
Keywords:
Status: NEW
Alias: CVE-2026-12816
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-03 04:01 UTC by OSIDB Bzimport
Modified: 2026-11-06 15:32 UTC (History)
104 users (show)

Fixed In Version:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:95887 0 None None None 2026-11-06 15:32:34 UTC

Description OSIDB Bzimport 2026-08-03 04:01:35 UTC 
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.
Comment 3 Jon Orris 2026-11-06 15:32:29 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Enterprise Application Platform 8.1

Via RHSA-2026:95887 https://access.redhat.com/errata/RHSA-2026:95887
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