High severity7.5NVD Advisory· Published Jan 22, 2026· Updated Jun 17, 2026
CVE-2026-23967
CVE-2026-23967
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
sm-cryptonpm | < 0.3.14 | 0.3.14 |
Affected products
3cpe:2.3:a:juneandgreen:sm-crypto:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:juneandgreen:sm-crypto:*:*:*:*:*:*:*:*range: <0.3.14
- (no CPE)range: < 0.3.14
Patches
Vulnerability mechanics
References
3- github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-qv7w-v773-3xqmnvdVendor AdvisoryWEB
- github.com/advisories/GHSA-qv7w-v773-3xqmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-23967ghsaADVISORY
News mentions
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