CVE-2026-23965

CVE-2026-23965 · sm-crypto Affected by Signature Forgery in SM2-DSA

This page contains facts from public vulnerability sources. Check the original advisory before updating.

sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature forgery vulnerability exists in the SM2 signature verification logic of sm-crypto prior to version 0.4.0. Under default configurations, an attacker can forge valid signatures for arbitrary public keys. If the message space contains sufficient redundancy, the attacker can fix the prefix of the message associated with the forged signature to satisfy specific formatting requirements. Version 0.4.0 patches the issue.

CVSS 7.5 · High · EPSS 0.2% · Fix available

Published

2026-01-22T02:05:43.426Z

Updated

2026-01-22T15:58:10.585Z

Stack: node

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