Bug 2517491

Summary: CVE-2026-59650 bouncycastle: Bouncy Castle for Java: Cryptographic key compromise due to unvalidated Diffie-Hellman peer value [fedora-all]
Product: [Fedora] Fedora Reporter: Lukas Javorsky <ljavorsk>
Component: bouncycastleAssignee: Mat Booth <mat.booth>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: mat.booth, mattias.ellert
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["9b15c8cb-91ec-4964-9fd0-2f2b306256b0"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2510203    

Description Lukas Javorsky 2026-08-17 16:34:37 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, MTI/A0 DH agreement exponentiates unvalidated peer value. This issue also affects Bouncy Castle for Java LTS before 2.73.12.