HighGHSA-wvqx-v3f6-w8rhCVE-2026-4600

jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic

Published 23 Mar 2026 · Updated 21 Jul 2026

Affected package

Affected: <11.1.1
Fixed in: 11.1.1

Update to the fixed version for your release line, for example:npm install jsrsasign@11.1.1

Details

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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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.