Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-4601

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.4%
CVSS Severity
CVSS v3 Score 8.7
Products affected by CVE-2026-4601


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