Bug 2523390 - CVE-2026-59639 byte-buddy: Bouncy Castle for Java: Cryptographic signature bypass [fedora-all]
Summary: CVE-2026-59639 byte-buddy: Bouncy Castle for Java: Cryptographic signature by...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: byte-buddy
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Marián Konček
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["dac5a138-28bd-425c-9a10-4...
Depends On:
Blocks: CVE-2026-59639
TreeView+ depends on / blocked
 
Reported: 2026-08-25 11:57 UTC by Jon Weiser
Modified: 2026-08-25 11:57 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description Jon Weiser 2026-08-25 11:57:35 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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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