CVE-2026-23965
High · 7.5CVSS
7.5
EPSS
0.2%
Published
Jan 22, 2026
CISA due date
—
The record
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature forgery vulnerability exists in the SM2 signature verification logic of sm-crypto prior to version 0.4.0. Under default configurations, an attacker can forge valid signatures for arbitrary public keys. If the message space contains sufficient redundancy, the attacker can fix the prefix of the message associated with the forged signature to satisfy specific formatting requirements. Version 0.4.0 patches the issue.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | sm-crypto | 0 | 0.4.0 |
Related vulnerabilities
- GHSA-hpwg-xg7m-3p6m sm-crypto Affected by Signature Forgery in SM2-DSA Same vulnerability
- CVE-2026-23966 sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms… Also affects sm-crypto
- CVE-2026-23967 sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms… Also affects sm-crypto
- GHSA-qv7w-v773-3xqm sm-crypto Affected by Signature Malleability in SM2-DSA Also affects sm-crypto
- GHSA-pgx9-497m-6c4v sm-crypto Affected by Private Key Recovery in SM2-PKE Also affects sm-crypto
- CVE-2026-87947 Improper Verification of Cryptographic Signature vulnerability in Drupal SAML SSO… CWE-347
- CVE-2026-84918 Improper Verification of Cryptographic Signature vulnerability in Drupal Monobank payment… CWE-347
- CVE-2026-102271 PyJWT is a Python implementation of JSON Web Token standards. CWE-347