https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-02T12:07:46.915993+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-239188 EUVD-2026-239188 2026-10-02T12:07:46.975751+00:00 EUVD-2026-239188 https://cve.radiocsirt.org/vuln/fkie_cve-2025-4658 fkie_cve-2025-4658 2026-10-02T12:07:46.975786+00:00

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.

 https://cve.radiocsirt.org/vuln/ghsa-56wx-66px-9j66 GHSA-56wx-66px-9j66 — OPKSSH Vulnerable to Authentication Bypass 2026-10-02T12:07:46.975819+00:00

Affected: Go: github.com/openpubkey/opkssh

### Impact

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.

### Patches

The vulnerability does not exist in more recent versions of OPKSSH. his only impacts OPKSSH when used to verify ssh keys on a server, the OPKSSH client is unaffected. To remediate upgrade to a version of OPKSSH v0.5.0 or greater.

To determine if you are vulnerable run on your server:

```bash opkssh --version ```

If the version is less than 0.5.0 you should upgrade. To upgrade to the latest version run:

```bash wget -qO- "https://raw.githubusercontent.com/openpubkey/opkssh/main/scripts/install-linux.sh" | sudo bash ```

### References

[CVE-2025-4658](https://www.cve.org/CVERecord?id=CVE-2025-4658)

The upstream vulnerability in OpenPubkey is [CVE-2025-3757](https://www.cve.org/CVERecord?id=CVE-2025-3757) and has the security advisory https://github.com/openpubkey/openpubkey/security/advisories/GHSA-537f-gxgm-3jjq

 https://cve.radiocsirt.org/vuln/opensuse-su-2025:15135-1 openSUSE-SU-2025:15135-1 — govulncheck-vulndb-0.0.20250515T200012-1.1 on GA media 2026-10-02T12:07:46.975860+00:00

govulncheck-vulndb-0.0.20250515T200012-1.1 on GA media

 https://cve.radiocsirt.org/vuln/ubuntu-cve-2025-4658 UBUNTU-CVE-2025-4658 2026-10-02T12:07:46.975884+00:00

Affected: Ubuntu:25.10: opkssh, Ubuntu:Pro:26.04:LTS: opkssh

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.