Vulnerability · Published Jan 22, 2026 · Assigned by GitHub_M
CVE-2026-23967sm-crypto Affected by Signature Malleability in SM2-DSA
High 7.5
In plain English
A high-severity security flaw in sm-crypto from JuneAndGreen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | sm-crypto | 0.3.14 | GHSA-qv7w-v773-3xqm |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| JuneAndGreen | sm-crypto | < 0.3.14 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N