CVE-2026-59997
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.
CVE-2026-59997 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: Routine.
Routine
CVSS
6.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0018
6th percentile
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| openssh · Debian 14 | 1:10.4p1-1 | DEBIAN-CVE-2026-59997 | Jul 28, 2026 |
| openssh · RHEL 10 | 9.9p1-29.el10_2 | RHSA-2026:85847 | Jul 8, 2026 |
| openssh · RHEL 8 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh · RHEL 9 | 0:9.9p1-13.el9_8 | RHSA-2026:85958 | Oct 21, 2026 |
| openssh · almalinux 10 | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 | Nov 7, 2026 |
| openssh · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh · almalinux 9 | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 | Nov 7, 2026 |
| openssh · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh · ol 10 | 0:9.9p1-29.0.1.el10_2 | ELSA-2026-85847 | Nov 7, 2026 |
| openssh · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| openssh · ol 9 | 0:9.9p1-13.0.1.el9_8 | ELSA-2026-85958 | Nov 7, 2026 |
| openssh · opensuse-leap 16.0 | 10.0p2-160000.7.1 | OPENSUSE-SU-2026:21477-1 | Jul 29, 2026 |
| openssh · rocky 10 | 0:9.9p1-29.el10_2.rocky.0.1 | RLSA-2026:85847 | Nov 7, 2026 |
| openssh · rocky 8 | 0:8.0p1-34.el8_10 | RLSA-2026:88211 | Nov 7, 2026 |
| openssh · rocky 9 | 0:9.9p1-13.el9_8.rocky.0.1 | RLSA-2026:85958 | Nov 7, 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 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh-askpass · RHEL 9 | 0:9.9p1-13.el9_8 | RHSA-2026:85958 | Oct 21, 2026 |
| openssh-askpass · almalinux 10 | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 | Nov 7, 2026 |
| openssh-askpass · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh-askpass · almalinux 9 | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 | Nov 7, 2026 |
| openssh-askpass · ol 10 | 0:9.9p1-29.0.1.el10_2 | ELSA-2026-85847 | Nov 7, 2026 |
| openssh-askpass · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| openssh-askpass · ol 9 | 0:9.9p1-13.0.1.el9_8 | ELSA-2026-85958 | Nov 7, 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 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh-cavs · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh-cavs · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 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 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh-clients · RHEL 9 | 0:9.9p1-13.el9_8 | RHSA-2026:85958 | Oct 21, 2026 |
| openssh-clients · almalinux 10 | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 | Nov 7, 2026 |
| openssh-clients · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh-clients · almalinux 9 | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 | Nov 7, 2026 |
| openssh-clients · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-clients · ol 10 | 0:9.9p1-29.0.1.el10_2 | ELSA-2026-85847 | Nov 7, 2026 |
| openssh-clients · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| openssh-clients · ol 9 | 0:9.9p1-13.0.1.el9_8 | ELSA-2026-85958 | Nov 7, 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 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh-keycat · RHEL 9 | 0:9.9p1-13.el9_8 | RHSA-2026:85958 | Oct 21, 2026 |
| openssh-keycat · almalinux 10 | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 | Nov 7, 2026 |
| openssh-keycat · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh-keycat · almalinux 9 | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 | Nov 7, 2026 |
| openssh-keycat · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-keycat · ol 10 | 0:9.9p1-29.0.1.el10_2 | ELSA-2026-85847 | Nov 7, 2026 |
| openssh-keycat · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| openssh-keycat · ol 9 | 0:9.9p1-13.0.1.el9_8 | ELSA-2026-85958 | Nov 7, 2026 |
| openssh-keycat-debuginfo · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-keysign · almalinux 10 | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 | Nov 7, 2026 |
| openssh-keysign · ol 10 | 0:9.9p1-29.0.1.el10_2 | ELSA-2026-85847 | Nov 7, 2026 |
| openssh-ldap · RHEL 8 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh-ldap · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh-ldap · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| openssh-server · RHEL 8 | 0:8.0p1-34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| openssh-server · RHEL 9 | 0:9.9p1-13.el9_8 | RHSA-2026:85958 | Oct 21, 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 | 9.9p1-29.el10_2.alma.1 | ALSA-2026:85847 | Nov 7, 2026 |
| openssh-server · almalinux 8 | 8.0p1-34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| openssh-server · almalinux 9 | 9.9p1-13.el9_8.alma.1 | ALSA-2026:85958 | Nov 7, 2026 |
| openssh-server · amzn 2023 | 9.9p1-16.amzn2023.0.1 | ALAS2023-2026-3354 | Nov 7, 2026 |
| openssh-server · ol 10 | 0:9.9p1-29.0.1.el10_2 | ELSA-2026-85847 | Nov 7, 2026 |
| openssh-server · ol 8 | 0:8.0p1-34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| openssh-server · ol 9 | 0:9.9p1-13.0.1.el9_8 | ELSA-2026-85958 | Nov 7, 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 | 0:0.10.3-8.34.el8_10 | RHSA-2026:88211 | Oct 24, 2026 |
| pam_ssh_agent_auth · RHEL 9 | 0:0.10.4-8.13.el9_8 | RHSA-2026:85958 | Oct 21, 2026 |
| pam_ssh_agent_auth · almalinux 8 | 0.10.3-8.34.el8_10 | ALSA-2026:88211 | Nov 7, 2026 |
| pam_ssh_agent_auth · almalinux 9 | 0.10.4-8.13.el9_8.alma.1 | ALSA-2026:85958 | Nov 7, 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 | 0:0.10.3-8.34.0.1.el8_10 | ELSA-2026-88211 | Nov 7, 2026 |
| pam_ssh_agent_auth · ol 9 | 0:0.10.4-9.13.0.1.el9_8 | ELSA-2026-85958 | Nov 7, 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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