CVE-2026-4600

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7	Exploit Mitigation Third Party Advisory
https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60	Patch
https://github.com/kjur/jsrsasign/pull/646	Issue Tracking
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940	Third Party Advisory
https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7	Exploit Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-03-23 06:16

Updated : 2026-03-23 16:41

NVD link : CVE-2026-4600

Mitre link : CVE-2026-4600

CVE.ORG link : CVE-2026-4600

JSON object : View

Products Affected

jsrsasign_project

jsrsasign

CWE

CWE-347

Improper Verification of Cryptographic Signature

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Un atacante puede falsificar firmas DSA o certificados X.509 que X509.verifySignature() acepta al suministrar par\u00e1metros de dominio maliciosos como g=1, y=1, y un r=1 fijo, lo que hace que la ecuaci\u00f3n de verificaci\u00f3n sea verdadera para cualquier hash."}], "lastModified": "2026-03-23T16:41:55.403", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "1EBBE1A6-4D19-4ED2-859C-73AFBDA25DEA", "versionEndExcluding": "11.1.1"}], "operator": "OR"}]}], "sourceIdentifier": "report@snyk.io"}