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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.

PUBLISHED Reserved 2026-01-19 | Published 2026-01-22 | Updated 2026-01-22 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem types

CWE-347: Improper Verification of Cryptographic Signature

Product status

< 0.3.14
affected

References

github.com/...crypto/security/advisories/GHSA-qv7w-v773-3xqm

cve.org (CVE-2026-23967)

nvd.nist.gov (CVE-2026-23967)

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