What is the CVSS score of CVE-2026-23967?

CVE-2026-23967 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Sm Crypto are affected by CVE-2026-23967?

Organizations using the SM2 signature verification logic of the sm-crypto library face notable risk from CVE-2026-23967, a signature bypass vulnerability rated CVSS 7.5.. A patch is available.

How to fix or mitigate CVE-2026-23967?

Within 7 days: Identify all affected systems running the SM2 signature verification logic of the sm-crypto librar and apply vendor patches promptly. Monitor vendor channels for patch availability.

Sm Crypto CVE-2026-23967

HIGH

Improper Verification of Cryptographic Signature (CWE-347)

2026-01-22 security-advisories@github.com

GHSA-qv7w-v773-3xqm

Information Disclosure Sm Crypto

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 22, 2026 - 03:15 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

501 npm packages depend on sm-crypto (315 direct, 192 indirect)

Ecosystem-wide dependent count for version 0.3.14.

DescriptionGitHub Advisory

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.

AnalysisAI

Sm-Crypto versions up to 0.3.14. is affected by improper verification of cryptographic signature (CVSS 7.5).

Technical ContextAI

This vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affects Sm-Crypto. 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.