CVE-2026-23966CRITICAL 9.1EPSS p10.9%

CVE-2026-23966CVE-2026-23966

Description

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS0.21% probability of exploitation · percentile 10.9% · 2026-06-19T12:03:05Z
Published2026-01-22
Last modified2026-02-25

Underlying weaknesses· 1

CWE-345

References

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

1

TypeTargetConfidenceTier
WeaknessInsufficient Verification of Data Authenticitycwe-3450%live

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