Authentication Bypass in OpenPubKey
Priority MEDIUM 48CWE-305Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-347.
Summary
Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00427 37th percentileScored 2026-11-07
Fix Fixed github.com/openpubkey/openpubkey (Go): 0.10.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| OPKSSH | OPKSSH | Openpubkey – 0.9.0 | — | No fix listed | CNA |
| — | github.com/openpubkey/openpubkey (Go) | before 0.10.0 | 0.10.0 | Patch available | GHSA-537f-gxgm-3jjq |
- OPKSSH VendorOPKSSH Affected Openpubkey – 0.9.0 Fixed in — No fix listed CNA
- github.com/openpubkey/openpubkey (Go) Vendor— Affected before 0.10.0 Fixed in 0.10.0 Patch available GHSA-537f-gxgm-3jjq
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openpubkey:openpubkey:*:*:*:*:*:*:*:* | before 0.10.0 | Vulnerable | Openpubkey |
- cpe:2.3:a:openpubkey:openpubkey:*:*:*:*:*:*:*:* Versions before 0.10.0 Vulnerable ·Openpubkey
Remediation
- Fix · GHSA-537f-gxgm-3jjq github.com/openpubkey/openpubkey (Go) Fixed in 0.10.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-3757
- 2026-10-03 Alias added: GHSA-537f-gxgm-3jjq
References
More Openpubkey vulnerabilities
- TI-2025-04157 Authentication Bypass in OPKSSH CVSS 4.0CRITICAL 9.3
Sources
- CVE-2025-3757 · CVE Program
- CVE-2025-3757 · NVD
- FIRST EPSS
- GHSA-537f-gxgm-3jjq · 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