要点
- CVE-2026-23967 是影响 sm-crypto (juneandgreen), sm-crypto 的高危 (CVSS 7.5)漏洞。
- 未来 30 天内被利用的概率（EPSS）：0.21%，高于 11.3% 的漏洞。
- 修复：升级到 0.3.14 或更高版本。
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
NVD 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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