juneandgreen/sm-crypto · Security
sm-crypto Affected by Private Key Recovery in SM2-PKE
- GHSA ID
- GHSA-pgx9-497m-6c4v
- CVE ID
- CVE-2026-23966
- Severity
- critical
- Published
- Updated
- CVSS
- 9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS v3
- 9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
Summary
A private key recovery vulnerability exists in the SM2 decryption logic of sm-crypto. By interacting with the SM2 decryption interface multiple times, an attacker can fully recover the private key within approximately several hundred interactions.
Credit
This vulnerability was discovered by:
- XlabAI Team of Tencent Xuanwu Lab
- Atuin Automated Vulnerability Discovery Engine
CWEs
- CWE-345 · Insufficient Verification of Data Authenticity