CVSS 4.0
9.3 criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:LCVE-2025-4658
Critical (9.3) in openpubkey. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/openpubkey/opkssh 0.5.0.
Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification. As OPKSSH depends on the OpenPubkey library for authentication, this vulnerability in OpenPubkey also applies to OPKSSH versions prior to 0.5.0 and would allow an attacker to bypass OPKSSH authentication.
Severity
CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-347, CWE-305
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openpubkey:openpubkey
- openpubkey:opkssh
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-56wx-66px-9j66 | Go | github.com/openpubkey/opkssh | <0.5.0 | 0.5.0 |
| GO-2025-3680 | Go | github.com/openpubkey/opkssh | <0.5.0 | 0.5.0 |