sm-crypto Affected by Signature Forgery in SM2-DSA
Published Jan 22, 2026
7.5
HIGHCVSS 3.1
EPSS 0.22%
Description
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.
Affected products
-
- Version < 0.4.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| JuneAndGreen | SM-Crypto | n/a |
|
- < 0.4.0
No data.
No Red Hat product state for this CVE.
sm-crypto
npm
Introduced 0 Fixed 0.4.0
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | sm-crypto | 0 | 0.4.0 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Jan 22, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Jan–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.22% (0.00218) | 11.14th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.19% (0.00194) | 9.20th | v5 (v2026.06.15) |
| Jan 22, 2026 | 0.01% (0.00009) | 0.64th | v4 (v2025.03.14) |
References (4)
- https://github.com/JuneAndGreen/sm-crypto/commit/85295a859d0766222d12ce2be3e6fce7b438b510 x_refsource_MISCPatch
- https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-hpwg-xg7m-3p6m x_refsource_CONFIRMVendor Advisory
- https://github.com/advisories/GHSA-hpwg-xg7m-3p6m Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-23965
| Link | Providers | Tags |
|---|---|---|
| https://github.com/JuneAndGreen/sm-crypto/commit/85295a859d0766222d12ce2be3e6fce7b438b510 | x_refsource_MISCPatch | |
| https://github.com/JuneAndGreen/sm-crypto/security/advisories/GHSA-hpwg-xg7m-3p6m | x_refsource_CONFIRMVendor Advisory | |
| https://github.com/advisories/GHSA-hpwg-xg7m-3p6m | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-23965 |
Change history (0)
No recorded changes yet.