CVE-2026-23965sm-crypto Affected by Signature Forgery in SM2-DSA
Updated under an hour ago ()
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It affects JuneAndGreen sm-crypto and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. A signature forgery vulnerability exists in the SM2 signature verification logic of sm-crypto prior to version 0.4.0. Under default configurations, an attacker can forge valid signatures for arbitrary public keys. If the message space contains sufficient redundancy, the attacker can fix the prefix of the message associated with the forged signature to satisfy specific formatting requirements. Version 0.4.0 patches the issue.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-347
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Jan 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
JuneAndGreen sm-crypto juneandgreen:sm_crypto (from the name) | before 0.4.0 | CNA record |
juneandgreen sm-crypto juneandgreen:sm-crypto | before 0.4.0 | NVD |
References
- https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-hpwg-xg7m-3p6mx-refsource-confirm, vendor-advisory
- https://github.com/JuneAndGreen/sm-crypto/commit/85295a859d0766222d12ce2be3e6fce7b438b510x-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.