Vulnerability in OpenBSD OpenSSH

CVE-2026-59999

In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

EPSS: 0.002 (5.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Openbsd Openssh — versions 0

Weakness classification (CWE)

CWE-348

References

cve@mitre.org (Mailing List, Release Notes)
cve@mitre.org (Release Notes)
cve@mitre.org (Release Notes)

Frequently asked questions

What is CVE-2026-59999?: CVE-2026-59999 is a medium-severity vulnerability in OpenBSD OpenSSH, classified under CWE-348. CVSS score: 5.9/10. Published 2026-07-08.
How severe is CVE-2026-59999?: Medium severity. CVSS v3 base score is 5.9 out of 10.