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CVE

CVE-2026-23967

sm-crypto Affected by Signature Malleability in SM2-DSA
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CVE

CVE-2026-23967

sm-crypto Affected by Signature Malleability in SM2-DSA

Summary

A signature malleability vulnerability exists in the SM2 signature verification logic of the sm-crypto library. An attacker can derive a new valid signature for a previously signed message from an existing signature.

Credit

This vulnerability was discovered by:

  • XlabAI Team of Tencent Xuanwu Lab
  • Atuin Automated Vulnerability Discovery Engine

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-qv7w-v773-3xqm, https://nvd.nist.gov/vuln/detail/CVE-2026-23967, https://github.com/JuneAndGreen/sm-crypto

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00009%
EPSS Percentile
0.00925%
Introduced Version
0
Fix Available
0.3.14

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