CVE-2026-59999 — MEDIUM (5.9)

Q: What is CVE-2026-59999?

CVE-2026-59999 is a vulnerability with a CVSS score of 5.9 (MEDIUM). In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

Q: How severe is CVE-2026-59999?

CVE-2026-59999 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-59999?

Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openssh.

Vulnerability Description

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

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Openbsd	Openssh	< 10.4

Related Weaknesses (CWE)

CWE-348

References

https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2Release Notes
https://www.openssh.org/releasenotes.html#10.4p1Release Notes
https://www.openwall.com/lists/oss-security/2026/07/06/5Mailing ListRelease Notes

FAQ

What is CVE-2026-59999?

CVE-2026-59999 is a vulnerability with a CVSS score of 5.9 (MEDIUM). In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

How severe is CVE-2026-59999?

CVE-2026-59999 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-59999?

Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openssh.