CVE-2026-59999
In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.
CVE-2026-59999 is fixed in 25 products on 1 platform, first by openssh-client 1:10.2p1-2ubuntu3.4, released July 7, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
5th percentile
In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| openssh · Debian 14 | 1:10.4p1-1 | DEBIAN-CVE-2026-59999 | Jul 28, 2026 |
| openssh · RHEL 10 | 9.9p1-7.el10_0.5 | RHSA-2026:76748 | Jul 31, 2026 |
| openssh · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh · RHEL 9 | 0:9.9p1-11.el9_8 | RHSA-2026:69130 | Sep 22, 2026 |
| openssh · almalinux 10 | 9.9p1-27.el10_2.alma.1 | ALSA-2026:69129 | Sep 21, 2026 |
| openssh · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh · almalinux 9 | 9.9p1-11.el9_8.alma.1 | ALSA-2026:69130 | Sep 21, 2026 |
| openssh · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh · ol 10 | 0:9.9p1-27.0.1.el10_2 | ELSA-2026-69129 | Sep 29, 2026 |
| openssh · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh · ol 9 | 0:9.9p1-11.0.1.el9_8 | ELSA-2026-69130 | Sep 22, 2026 |
| openssh · opensuse-leap 16.0 | 10.0p2-160000.7.1 | OPENSUSE-SU-2026:21477-1 | Jul 29, 2026 |
| openssh · rocky 10 | 0:9.9p1-27.el10_2.rocky.0.1 | RLSA-2026:69129 | Sep 22, 2026 |
| openssh · rocky 8 | 0:8.0p1-33.el8_10 | RLSA-2026:69266 | Sep 22, 2026 |
| openssh · rocky 9 | 0:9.9p1-11.el9_8.rocky.0.1 | RLSA-2026:69130 | Sep 22, 2026 |
| openssh · sles 15.6 | 9.6p1-150600.6.49.1 | SUSE-SU-2026:3605-1 | Aug 13, 2026 |
| openssh · sles 15.7 | 9.6p1-150600.6.49.1 | SUSE-SU-2026:3605-1 | Aug 13, 2026 |
| openssh-askpass · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh-askpass · RHEL 9 | 0:9.9p1-11.el9_8 | RHSA-2026:69130 | Sep 22, 2026 |
| openssh-askpass · almalinux 10 | 9.9p1-27.el10_2.alma.1 | ALSA-2026:69129 | Sep 21, 2026 |
| openssh-askpass · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh-askpass · almalinux 9 | 9.9p1-11.el9_8.alma.1 | ALSA-2026:69130 | Sep 21, 2026 |
| openssh-askpass · ol 10 | 0:9.9p1-27.0.1.el10_2 | ELSA-2026-69129 | Sep 29, 2026 |
| openssh-askpass · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh-askpass · ol 9 | 0:9.9p1-11.0.1.el9_8 | ELSA-2026-69130 | Sep 22, 2026 |
| openssh-askpass-gnome · opensuse-leap 16.0 | 10.0p2-160000.7.1 | OPENSUSE-SU-2026:21477-1 | Jul 29, 2026 |
| openssh-askpass-gnome · sles 15.6 | 9.6p1-150600.6.49.1 | SUSE-SU-2026:3605-1 | Aug 13, 2026 |
| openssh-askpass-gnome · sles 15.7 | 9.6p1-150600.6.49.1 | SUSE-SU-2026:3605-1 | Aug 13, 2026 |
| openssh-cavs · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh-cavs · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh-cavs · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh-client · Ubuntu 18.04.6 LTS (bionic) | 1:7.6p1-4ubuntu0.7+esm6 | openssh-client 1:7.6p1-4ubuntu0.7+esm6 | Aug 11, 2026 |
| openssh-client · Ubuntu 20.04 LTS (focal) | 1:8.2p1-4ubuntu0.13+esm3 | openssh-client 1:8.2p1-4ubuntu0.13+esm3 | Aug 11, 2026 |
| openssh-client · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.16 | openssh-client 1:8.9p1-3ubuntu0.16 | Jul 14, 2026 |
| openssh-client · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.18 | openssh-client 1:9.6p1-3ubuntu13.18 | Jul 14, 2026 |
| openssh-client · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | openssh-client 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| openssh-client-gssapi · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | openssh-client-gssapi 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| openssh-clients · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh-clients · RHEL 9 | 0:9.9p1-11.el9_8 | RHSA-2026:69130 | Sep 22, 2026 |
| openssh-clients · almalinux 10 | 9.9p1-27.el10_2.alma.1 | ALSA-2026:69129 | Sep 21, 2026 |
| openssh-clients · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh-clients · almalinux 9 | 9.9p1-11.el9_8.alma.1 | ALSA-2026:69130 | Sep 21, 2026 |
| openssh-clients · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-clients · ol 10 | 0:9.9p1-27.0.1.el10_2 | ELSA-2026-69129 | Sep 29, 2026 |
| openssh-clients · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh-clients · ol 9 | 0:9.9p1-11.0.1.el9_8 | ELSA-2026-69130 | Sep 22, 2026 |
| openssh-clients-debuginfo · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-debuginfo · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-debugsource · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-keycat · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh-keycat · RHEL 9 | 0:9.9p1-11.el9_8 | RHSA-2026:69130 | Sep 22, 2026 |
| openssh-keycat · almalinux 10 | 9.9p1-27.el10_2.alma.1 | ALSA-2026:69129 | Sep 21, 2026 |
| openssh-keycat · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh-keycat · almalinux 9 | 9.9p1-11.el9_8.alma.1 | ALSA-2026:69130 | Sep 21, 2026 |
| openssh-keycat · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-keycat · ol 10 | 0:9.9p1-27.0.1.el10_2 | ELSA-2026-69129 | Sep 29, 2026 |
| openssh-keycat · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh-keycat · ol 9 | 0:9.9p1-11.0.1.el9_8 | ELSA-2026-69130 | Sep 22, 2026 |
| openssh-keycat-debuginfo · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-keysign · almalinux 10 | 9.9p1-27.el10_2.alma.1 | ALSA-2026:69129 | Sep 21, 2026 |
| openssh-keysign · ol 10 | 0:9.9p1-27.0.1.el10_2 | ELSA-2026-69129 | Sep 29, 2026 |
| openssh-ldap · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh-ldap · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh-ldap · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh-server · RHEL 8 | 0:8.0p1-33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| openssh-server · RHEL 9 | 0:9.9p1-11.el9_8 | RHSA-2026:69130 | Sep 22, 2026 |
| openssh-server · Ubuntu 18.04.6 LTS (bionic) | 1:7.6p1-4ubuntu0.7+esm6 | openssh-server 1:7.6p1-4ubuntu0.7+esm6 | Aug 11, 2026 |
| openssh-server · Ubuntu 20.04 LTS (focal) | 1:8.2p1-4ubuntu0.13+esm3 | openssh-server 1:8.2p1-4ubuntu0.13+esm3 | Aug 11, 2026 |
| openssh-server · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.16 | openssh-server 1:8.9p1-3ubuntu0.16 | Jul 14, 2026 |
| openssh-server · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.18 | openssh-server 1:9.6p1-3ubuntu13.18 | Jul 14, 2026 |
| openssh-server · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | openssh-server 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| openssh-server · almalinux 10 | 9.9p1-27.el10_2.alma.1 | ALSA-2026:69129 | Sep 21, 2026 |
| openssh-server · almalinux 8 | 8.0p1-33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| openssh-server · almalinux 9 | 9.9p1-11.el9_8.alma.1 | ALSA-2026:69130 | Sep 21, 2026 |
| openssh-server · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-server · ol 10 | 0:9.9p1-27.0.1.el10_2 | ELSA-2026-69129 | Sep 29, 2026 |
| openssh-server · ol 8 | 0:8.0p1-33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| openssh-server · ol 9 | 0:9.9p1-11.0.1.el9_8 | ELSA-2026-69130 | Sep 22, 2026 |
| openssh-server-debuginfo · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-server-gssapi · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | openssh-server-gssapi 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| openssh-sftp-server · Ubuntu 18.04.6 LTS (bionic) | 1:7.6p1-4ubuntu0.7+esm6 | openssh-sftp-server 1:7.6p1-4ubuntu0.7+esm6 | Aug 11, 2026 |
| openssh-sftp-server · Ubuntu 20.04 LTS (focal) | 1:8.2p1-4ubuntu0.13+esm3 | openssh-sftp-server 1:8.2p1-4ubuntu0.13+esm3 | Aug 11, 2026 |
| openssh-sftp-server · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.16 | openssh-sftp-server 1:8.9p1-3ubuntu0.16 | Jul 14, 2026 |
| openssh-sftp-server · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.18 | openssh-sftp-server 1:9.6p1-3ubuntu13.18 | Jul 14, 2026 |
| openssh-sftp-server · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | openssh-sftp-server 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| openssh-sk-dummy · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-sk-dummy-debuginfo · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-tests · Ubuntu 20.04 LTS (focal) | 1:8.2p1-4ubuntu0.13+esm3 | openssh-tests 1:8.2p1-4ubuntu0.13+esm3 | Aug 11, 2026 |
| openssh-tests · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.16 | openssh-tests 1:8.9p1-3ubuntu0.16 | Jul 14, 2026 |
| openssh-tests · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.18 | openssh-tests 1:9.6p1-3ubuntu13.18 | Jul 14, 2026 |
| openssh-tests · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | openssh-tests 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| pam_ssh_agent_auth · RHEL 8 | 0:0.10.3-8.33.el8_10 | RHSA-2026:69266 | Sep 22, 2026 |
| pam_ssh_agent_auth · RHEL 9 | 0:0.10.4-8.11.el9_8 | RHSA-2026:69130 | Sep 22, 2026 |
| pam_ssh_agent_auth · almalinux 8 | 0.10.3-8.33.el8_10 | ALSA-2026:69266 | Sep 21, 2026 |
| pam_ssh_agent_auth · almalinux 9 | 0.10.4-8.11.el9_8.alma.1 | ALSA-2026:69130 | Sep 21, 2026 |
| pam_ssh_agent_auth · amzn 2023 | 0.10.4-10.16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| pam_ssh_agent_auth · ol 8 | 0:0.10.3-8.33.0.1.el8_10 | ELSA-2026-69266 | Sep 23, 2026 |
| pam_ssh_agent_auth · ol 9 | 0:0.10.4-9.11.0.1.el9_8 | ELSA-2026-69130 | Sep 22, 2026 |
| pam_ssh_agent_auth-debuginfo · amzn 2023 | 0.10.4-10.16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| ssh · Ubuntu 18.04.6 LTS (bionic) | 1:7.6p1-4ubuntu0.7+esm6 | ssh 1:7.6p1-4ubuntu0.7+esm6 | Aug 11, 2026 |
| ssh · Ubuntu 20.04 LTS (focal) | 1:8.2p1-4ubuntu0.13+esm3 | ssh 1:8.2p1-4ubuntu0.13+esm3 | Aug 11, 2026 |
| ssh · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.16 | ssh 1:8.9p1-3ubuntu0.16 | Jul 14, 2026 |
| ssh · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.18 | ssh 1:9.6p1-3ubuntu13.18 | Jul 14, 2026 |
| ssh · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | ssh 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
| ssh-askpass-gnome · Ubuntu 18.04.6 LTS (bionic) | 1:7.6p1-4ubuntu0.7+esm6 | ssh-askpass-gnome 1:7.6p1-4ubuntu0.7+esm6 | Aug 11, 2026 |
| ssh-askpass-gnome · Ubuntu 20.04 LTS (focal) | 1:8.2p1-4ubuntu0.13+esm3 | ssh-askpass-gnome 1:8.2p1-4ubuntu0.13+esm3 | Aug 11, 2026 |
| ssh-askpass-gnome · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.16 | ssh-askpass-gnome 1:8.9p1-3ubuntu0.16 | Jul 14, 2026 |
| ssh-askpass-gnome · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.18 | ssh-askpass-gnome 1:9.6p1-3ubuntu13.18 | Jul 14, 2026 |
| ssh-askpass-gnome · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.4 | ssh-askpass-gnome 1:10.2p1-2ubuntu3.4 | Jul 7, 2026 |
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