CVE-2026-23967
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductJuneandgreen Sm-crypto
PublishedJan 22, 2026
First seenJan 22, 2026
Weakness typeCWE-347CWE-347
How to fix
Update
- juneandgreen sm-crypto0.3.14 or later
- sm-crypto0.3.14 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| juneandgreen sm-crypto | v < 0.3.14 | 0.3.14 |
| sm-cryptonpm | v < 0.3.14 | 0.3.14 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.