CVE-2026-23966

critical · 9.1

sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A private key recovery vulnerability exists in the SM2 decryption logic of sm-crypto prior to version 0.3.14. By interacting with the SM2 decryption interface multiple times, an attacker can fully recover the private key within approximately several hundred interactions. Version 0.3.14 patches the issue.

9.1

CVSS

0.2%

EPSS (exploit prob.)

15th

EPSS percentile

2026-01-22

Published

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

Weaknesses

CWE-345

Affected products

Vendor	Product	Affected versions
juneandgreen	sm-crypto	< 0.3.14

Check a specific version with /api/v1/cve/match.

References

https://github.com/JuneAndGreen/sm-crypto/commit/b1c824e58fdf1eaa73692c124a095819a8c45707
https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-pgx9-497m-6c4v

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-23966