Bug 2510197 (CVE-2026-59639) - CVE-2026-59639 org.bouncycastle/bcpkix-jdk15on: org.bouncycastle/bcpkix-fips: Bouncy Castle for Java: Cryptographic signature bypass
Summary: CVE-2026-59639 org.bouncycastle/bcpkix-jdk15on: org.bouncycastle/bcpkix-fips:...
Keywords:
Status: NEW
Alias: CVE-2026-59639
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2523389 2523390 2523391
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-03 02:01 UTC by OSIDB Bzimport
Modified: 2026-08-25 12:06 UTC (History)
44 users (show)

Fixed In Version:
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Last Closed:
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Description OSIDB Bzimport 2026-08-03 02:01:43 UTC 
In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).
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