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CVE-2026-4600

HIGH

7.4

Description

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.

CVE Details

CVSS v3.1 Score7.4

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published3/23/2026

Last Modified3/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

jsrsasign_project:jsrsasign

Weaknesses (CWE)

CWE-347CWE-347

References

https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7(report@snyk.io)

https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60(report@snyk.io)

https://github.com/kjur/jsrsasign/pull/646(report@snyk.io)

https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940(report@snyk.io)

https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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