CVE-2026-23967
sm-crypto Affected by Signature Malleability in SM2-DSA
7.5
HIGH
CVSS 3.1
EPSS 0.01%
Description
### Summary A signature malleability vulnerability exists in the SM2 signature verification logic of the sm-crypto library. An attacker can derive a new valid signature for a previously signed message from an existing signature. ### Credit This vulnerability was discovered by: - XlabAI Team of Tencent Xuanwu Lab - Atuin Automated Vulnerability Discovery Engine
How to fix CVE-2026-23967
To remediate CVE-2026-23967, upgrade the affected package to a fixed version below.
- —upgrade to 0.3.14 or later
Is CVE-2026-23967 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.3.14
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |