PT-2026-3894 · Sm-Crypto · Sm-Crypto

Xlabaiteam · CVE-2026-23967 · Published 2026-01-21 · Updated 2026-02-25

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions sm-crypto versions prior to 0.3.14

Description The sm-crypto library, providing JavaScript implementations of Chinese cryptographic algorithms SM2, SM3, and SM4, contains a signature malleability issue in its SM2 signature verification logic. An attacker can generate a new valid signature for a previously signed message using an existing signature.

Recommendations Update to version 0.3.14 or later.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-23967

GHSA-QV7W-V773-3XQM

Affected Products

Sm-Crypto

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23967.json · Exploit
• https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-qv7w-v773-3xqm · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23967 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23967 · Security Note
• https://osv.dev/vulnerability/GHSA-qv7w-v773-3xqm · Vendor Advisory
• https://github.com/JuneAndGreen/sm-crypto · Note
• https://twitter.com/CVEnew/status/2014182489359892606 · Twitter Post
• https://t.me/CVEtracker/42721 · Telegram Post
• https://twitter.com/_cvereports/status/2014187189936984509 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2014240938676064736 · Twitter Post
• https://t.me/cveNotify/153164 · Telegram Post
• https://twitter.com/cracbot/status/2016103979357524334 · Twitter Post