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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-4601 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  Snyk
CVSS-BT 8.8 HIGH
Vector:  CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586 Snyk Exploit  Mitigation  Third Party Advisory 
https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb Snyk Patch 
https://github.com/kjur/jsrsasign/pull/645 Snyk Issue Tracking 
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941 Snyk Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-325 Missing Cryptographic Step Snyk  

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-4601
NVD Published Date:
03/23/2026
NVD Last Modified:
06/17/2026
Source:
Snyk