Bug 2450208 (CVE-2026-4600) - CVE-2026-4600 jsrsasign: jsrsasign: Cryptographic signature forgery via malicious DSA domain parameters
Summary: CVE-2026-4600 jsrsasign: jsrsasign: Cryptographic signature forgery via malic...
Keywords:
Status: NEW
Alias: CVE-2026-4600
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:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-23 06:02 UTC by OSIDB Bzimport
Modified: 2026-03-23 06:56 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-23 06:02:04 UTC 
Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash.
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