CVE-2026-23967
sm-crypto Affected by Signature Malleability in SM2-DSA
- State
- Published
- Severity
- 7.5 High
- Published
- Jan 22, 2026
- Updated
- Jan 22, 2026
- Reserved
- Jan 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | GitHub_M |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
sm-cryptoJuneAndGreen |
|
References
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