Vulnerability Details CVE-2026-23967
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature malleability vulnerability exists in the SM2 signature verification logic of the sm-crypto library prior to version 0.3.14. An attacker can derive a new valid signature for a previously signed message from an existing signature. Version 0.3.14 patches the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.8%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-23967
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cpe:2.3:a:juneandgreen:sm-crypto:*