CVE-2026-4601
HIGH
jsrsasign_project
NVD
CVSS Score
8.7
Severity
HIGH
Published
Mar 23, 2026
Vendor
jsrsasign_project
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.