Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-07-08T00:13:08 openssh: OpenSSH sshd: Security bypass due to incorrect handling of forwarding and tunneling options 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CWE-358

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

A flaw was found in `sshd`, the OpenSSH server daemon. When `DisableForwarding=yes` is configured to prevent network traffic forwarding, it incorrectly fails to take precedence over `PermitTunnel=yes`. This allows a remote attacker to bypass intended security restrictions and establish a tunnel, potentially leading to unauthorized network access or circumvention of security policies, even when forwarding is explicitly disabled.

Red Hat Hardened Images 2026-07-09T00:00:00Z RHSA-2026:37382 openssh-main-10.4p1-1.hum1 Red Hat Enterprise Linux 10 Fix deferred openssh Red Hat Enterprise Linux 6 Fix deferred openssh Red Hat Enterprise Linux 7 Fix deferred openssh Red Hat Enterprise Linux 8 Fix deferred openssh Red Hat Enterprise Linux 9 Fix deferred openssh Red Hat OpenShift Container Platform 4 Fix deferred rhcos https://www.cve.org/CVERecord?id=CVE-2026-59999 https://nvd.nist.gov/vuln/detail/CVE-2026-59999 https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2 https://www.openssh.org/releasenotes.html#10.4p1 https://www.openwall.com/lists/oss-security/2026/07/06/5