CVE-2026-23966

CRITICAL
2026-01-22 [email protected] GHSA-pgx9-497m-6c4v
Authentication Bypass Sm Crypto
9.1
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
Patch Released
Feb 25, 2026 - 15:30 nvd
Patch available
CVE Published
Jan 22, 2026 - 03:15 nvd
CRITICAL 9.1

DescriptionNVD

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.

AnalysisAI

The sm-crypto JavaScript library has a private key recovery vulnerability in its SM2 implementation, allowing attackers to extract secret keys from signatures.

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RemediationAI

Within 24 hours: Identify all affected systems running the SM2 decryption logic of sm-crypto and apply vendor patches immediately. Vendor patch is available.

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CVE-2026-23966 vulnerability details – vuln.today
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