sm-crypto Affected by Signature Malleability in SM2-DSA
Priority LOW 38CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-347.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00211 11th percentileScored 2026-11-07
Fix Fixed sm-crypto (JuneAndGreen): 0.3.14sm-crypto (npm): 0.3.14
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| JuneAndGreen | sm-crypto | before 0.3.14 | 0.3.14 | Patch available | CNA |
| — | sm-crypto (npm) | before 0.3.14 | 0.3.14 | Patch available | GHSA-qv7w-v773-3xqm |
- sm-crypto VendorJuneAndGreen Affected before 0.3.14 Fixed in 0.3.14 Patch available CNA
- sm-crypto (npm) Vendor— Affected before 0.3.14 Fixed in 0.3.14 Patch available GHSA-qv7w-v773-3xqm
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:juneandgreen:sm-crypto:*:*:*:*:*:*:*:* | before 0.3.14 | Vulnerable | JuneAndGreen |
- cpe:2.3:a:juneandgreen:sm-crypto:*:*:*:*:*:*:*:* Versions before 0.3.14 Vulnerable ·JuneAndGreen
Remediation
- Fix · CNA sm-crypto (JuneAndGreen) Fixed in 0.3.14
- Fix · GHSA-qv7w-v773-3xqm sm-crypto (npm) Fixed in 0.3.14 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-23967
- 2026-10-03 Alias added: GHSA-qv7w-v773-3xqm
References
More JuneAndGreen Sm-crypto vulnerabilities
- TI-2026-19308 sm-crypto Affected by Private Key Recovery in SM2-PKE CVSS 3.1CRITICAL 9.1
- TI-2026-19307 sm-crypto Affected by Signature Forgery in SM2-DSA CVSS 3.1HIGH 7.5
Sources
- CVE-2026-23967 · CVE Program
- CVE-2026-23967 · NVD
- FIRST EPSS
- GHSA-qv7w-v773-3xqm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences