What’s Vulnerable › Vulnerabilities
CVE-2026-23967: sm-crypto Affected by Signature Malleability in SM2-DSA
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-01-22 · updated 2026-06-17
- Weakness: CWE-347
Description
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.
Affected products
- JuneAndGreen sm-crypto: before 0.3.14 — fixed in 0.3.14
How to fix
Upgrade to a fixed version: JuneAndGreen sm-crypto 0.3.14. Check the vendor advisory for mitigations.
References
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