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GHSA-wvqx-v3f6-w8rh

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

Source: GitHub Advisory Database (reviewed) High CVE-2026-4600

Packages

EcosystemPackageAffectedFixed in
npm jsrsasign < 11.1.1 11.1.1

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.