CVE-2026-23966 — Vulnerability in sm-crypto — CVE Details

CRITICAL

sm-crypto Affected by Private Key Recovery in SM2-PKE

Published January 21, 2026Updated February 3, 2026Source: osv

Summary

### 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

Advisory Timeline

First published January 21, 2026 (264 days ago).
Last revised February 3, 2026 — 12 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm

Update sm-crypto to 0.3.14 or later

npm install sm-crypto@0.3.14

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: npm (1).

Package	Ecosystem	Affected	Fixed In
sm-crypto	npm	All versions	0.3.14

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-345
Insufficient Verification of Data AuthenticityMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

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

References

Frequently Asked Questions

What is CVE-2026-23966?: sm-crypto Affected by Private Key Recovery in SM2-PKE This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
How do I check if my project is affected by CVE-2026-23966?: CVE-2026-23966 affects sm-crypto. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-23966 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.1

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-pgx9-497m-6c4v

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