Bug 2524924

Summary:	CVE-2026-59641 bouncycastle: Bouncy Castle for Java: S/MIME signature validation bypass via signer-asserted signing time [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Sandipan Roy <saroy>
Component:	bouncycastle	Assignee:	Mat Booth <mat.booth>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	mat.booth, mattias.ellert
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["5a755c3c-d641-4b67-84b3-291fa9d478cd"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2510196

Description Sandipan Roy 2026-08-27 10:46:05 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, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcmail-fips and bcjmail-fips 1.0.7 (1.0.X series), 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).