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CVE-2026-4601

HIGH

8.7

Description

Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.

CVE Details

CVSS v3.1 Score8.7

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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-325

References

https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586(report@snyk.io)

https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb(report@snyk.io)

https://github.com/kjur/jsrsasign/pull/645(report@snyk.io)

https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941(report@snyk.io)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.