Vulnerability details
CVE-2026-23967
JuneAndGreen sm-crypto
sm-crypto Affected by Signature Malleability in SM2-DSA
CVSS 3.1
7.5High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| JuneAndGreen | sm-crypto | < 0.3.14 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-01-22
- Last updated
- 2026-01-22
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.21%
Probability of exploitation in 30 days
11.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-347Improper Verification of Cryptographic Signature