CVE-2026-35388
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
CVE-2026-35388 is fixed in 23 products on 1 platform, first by openssh-client 1:8.9p1-3ubuntu0.15, released April 2, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0013
2nd percentile
This update for openssh fixes the following issues - CVE-2026-3497: information disclosure or denial of service due to uninitialized variables (bsc#1259642). - CVE-2026-35385: a file downloaded by scp may be installed setuid or setgid (bsc#1261427). - CVE-2026-35388: omitted connection multiplexing confirmation for proxy-mode multiplexing sessions (bsc#1261441). - CVE-2026-35414: mishandling of authorized_keys principals option (bsc#1261430). - potential security issue when validating mac (bsc#1264568).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| openssh · Debian 12.15 (bookworm) | 1:9.2p1-2+deb12u10 | DEBIAN-CVE-2026-35388 | Apr 2, 2026 |
| openssh · Debian 13.5 (trixie) | 1:10.0p1-7+deb13u3 | DEBIAN-CVE-2026-35388 | Apr 2, 2026 |
| openssh · Debian 14 | 1:10.3p1-1 | DEBIAN-CVE-2026-35388 | Apr 2, 2026 |
| openssh · RHEL 10 | 9.9p1-7.el10_0.3 | RHSA-2026:12389 | Apr 2, 2026 |
| openssh · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh · RHEL 9 | 0:9.9p1-7.el9_8 | RHSA-2026:19219 | May 15, 2026 |
| openssh · almalinux 10 | 9.9p1-23.el10_2.alma.1 | ALSA-2026:19069 | May 19, 2026 |
| openssh · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh · almalinux 9 | 9.9p1-7.el9_8.alma.1 | ALSA-2026:19219 | May 19, 2026 |
| openssh · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh · ol 10 | 0:9.9p1-14.0.1.el10_1 | ELSA-2026-13380 | May 5, 2026 |
| openssh · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh · ol 9 | 0:8.7p1-49.0.1.el9_7 | ELSA-2026-13381 | May 5, 2026 |
| openssh · opensuse-leap 16.0 | 10.0p2-160000.6.1 | OPENSUSE-SU-2026:21044-1 | Jun 24, 2026 |
| openssh · rocky 10 | 0:9.9p1-23.el10_2.rocky.0.1 | RLSA-2026:19069 | May 29, 2026 |
| openssh · rocky 8 | 0:8.0p1-29.el8_10 | RLSA-2026:13383 | May 6, 2026 |
| openssh · rocky 9 | 0:9.9p1-7.el9_8.rocky.0.1 | RLSA-2026:19219 | May 28, 2026 |
| openssh · sles 15.6 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 | Jun 11, 2026 |
| openssh · sles 15.7 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 | Jun 11, 2026 |
| openssh · sles 16.0 | 10.0p2-160000.6.1 | SUSE-SU-2026:22352-1 | Jun 24, 2026 |
| openssh-askpass · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh-askpass · RHEL 9 | 0:9.9p1-7.el9_8 | RHSA-2026:19219 | May 15, 2026 |
| openssh-askpass · almalinux 10 | 9.9p1-23.el10_2.alma.1 | ALSA-2026:19069 | May 19, 2026 |
| openssh-askpass · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh-askpass · almalinux 9 | 9.9p1-7.el9_8.alma.1 | ALSA-2026:19219 | May 19, 2026 |
| openssh-askpass · ol 10 | 0:9.9p1-14.0.1.el10_1 | ELSA-2026-13380 | May 5, 2026 |
| openssh-askpass · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh-askpass · ol 9 | 0:8.7p1-49.0.1.el9_7 | ELSA-2026-13381 | May 5, 2026 |
| openssh-askpass-gnome · opensuse-leap 16.0 | 10.0p2-160000.6.1 | OPENSUSE-SU-2026:21044-1 | Jun 24, 2026 |
| openssh-askpass-gnome · sles 15.6 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 | Jun 11, 2026 |
| openssh-askpass-gnome · sles 15.7 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 | Jun 11, 2026 |
| openssh-askpass-gnome · sles 16.0 | 10.0p2-160000.6.1 | SUSE-SU-2026:22352-1 | Jun 24, 2026 |
| openssh-cavs · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh-cavs · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh-cavs · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh-client · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.15 | openssh-client 1:8.9p1-3ubuntu0.15 | Apr 2, 2026 |
| openssh-client · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.16 | openssh-client 1:9.6p1-3ubuntu13.16 | Apr 2, 2026 |
| openssh-client · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | openssh-client 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| openssh-client · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | openssh-client 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| openssh-client-gssapi · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | openssh-client-gssapi 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| openssh-client-gssapi · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | openssh-client-gssapi 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| openssh-clients · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh-clients · RHEL 9 | 0:9.9p1-7.el9_8 | RHSA-2026:19219 | May 15, 2026 |
| openssh-clients · almalinux 10 | 9.9p1-23.el10_2.alma.1 | ALSA-2026:19069 | May 19, 2026 |
| openssh-clients · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh-clients · almalinux 9 | 9.9p1-7.el9_8.alma.1 | ALSA-2026:19219 | May 19, 2026 |
| openssh-clients · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-clients · ol 10 | 0:9.9p1-14.0.1.el10_1 | ELSA-2026-13380 | May 5, 2026 |
| openssh-clients · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh-clients · ol 9 | 0:8.7p1-49.0.1.el9_7 | ELSA-2026-13381 | May 5, 2026 |
| openssh-clients-debuginfo · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-debuginfo · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-debugsource · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-keycat · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh-keycat · RHEL 9 | 0:9.9p1-7.el9_8 | RHSA-2026:19219 | May 15, 2026 |
| openssh-keycat · almalinux 10 | 9.9p1-23.el10_2.alma.1 | ALSA-2026:19069 | May 19, 2026 |
| openssh-keycat · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh-keycat · almalinux 9 | 9.9p1-7.el9_8.alma.1 | ALSA-2026:19219 | May 19, 2026 |
| openssh-keycat · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-keycat · ol 10 | 0:9.9p1-14.0.1.el10_1 | ELSA-2026-13380 | May 5, 2026 |
| openssh-keycat · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh-keycat · ol 9 | 0:8.7p1-49.0.1.el9_7 | ELSA-2026-13381 | May 5, 2026 |
| openssh-keycat-debuginfo · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-keysign · almalinux 10 | 9.9p1-23.el10_2.alma.1 | ALSA-2026:19069 | May 19, 2026 |
| openssh-keysign · ol 10 | 0:9.9p1-14.0.1.el10_1 | ELSA-2026-13380 | May 5, 2026 |
| openssh-ldap · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh-ldap · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh-ldap · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh-server · RHEL 8 | 0:8.0p1-29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| openssh-server · RHEL 9 | 0:9.9p1-7.el9_8 | RHSA-2026:19219 | May 15, 2026 |
| openssh-server · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.15 | openssh-server 1:8.9p1-3ubuntu0.15 | Apr 2, 2026 |
| openssh-server · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.16 | openssh-server 1:9.6p1-3ubuntu13.16 | Apr 2, 2026 |
| openssh-server · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | openssh-server 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| openssh-server · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | openssh-server 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| openssh-server · almalinux 10 | 9.9p1-23.el10_2.alma.1 | ALSA-2026:19069 | May 19, 2026 |
| openssh-server · almalinux 8 | 8.0p1-29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| openssh-server · almalinux 9 | 9.9p1-7.el9_8.alma.1 | ALSA-2026:19219 | May 19, 2026 |
| openssh-server · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-server · ol 10 | 0:9.9p1-14.0.1.el10_1 | ELSA-2026-13380 | May 5, 2026 |
| openssh-server · ol 8 | 0:8.0p1-29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| openssh-server · ol 9 | 0:8.7p1-49.0.1.el9_7 | ELSA-2026-13381 | May 5, 2026 |
| openssh-server-debuginfo · amzn 2023 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| openssh-server-gssapi · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | openssh-server-gssapi 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| openssh-server-gssapi · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | openssh-server-gssapi 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| openssh-sftp-server · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.15 | openssh-sftp-server 1:8.9p1-3ubuntu0.15 | Apr 2, 2026 |
| openssh-sftp-server · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.16 | openssh-sftp-server 1:9.6p1-3ubuntu13.16 | Apr 2, 2026 |
| openssh-sftp-server · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | openssh-sftp-server 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| openssh-sftp-server · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | openssh-sftp-server 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| openssh-tests · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.15 | openssh-tests 1:8.9p1-3ubuntu0.15 | Apr 2, 2026 |
| openssh-tests · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.16 | openssh-tests 1:9.6p1-3ubuntu13.16 | Apr 2, 2026 |
| openssh-tests · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | openssh-tests 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| openssh-tests · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | openssh-tests 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| pam_ssh_agent_auth · RHEL 8 | 0:0.10.3-7.29.el8_10 | RHSA-2026:13383 | May 15, 2026 |
| pam_ssh_agent_auth · RHEL 9 | 0:0.10.4-7.7.el9_8 | RHSA-2026:19219 | May 15, 2026 |
| pam_ssh_agent_auth · almalinux 8 | 0.10.3-7.29.el8_10 | ALSA-2026:13383 | May 4, 2026 |
| pam_ssh_agent_auth · almalinux 9 | 0.10.4-7.7.el9_8.alma.1 | ALSA-2026:19219 | May 19, 2026 |
| pam_ssh_agent_auth · amzn 2023 | 0.10.4-4.8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| pam_ssh_agent_auth · ol 8 | 0:0.10.3-7.29.0.1.el8_10 | ELSA-2026-13383 | May 5, 2026 |
| pam_ssh_agent_auth · ol 9 | 0:0.10.4-5.49.0.1.el9_7 | ELSA-2026-13381 | May 5, 2026 |
| pam_ssh_agent_auth-debuginfo · amzn 2023 | 0.10.4-4.8.amzn2023.0.18 | ALAS2023-2026-1745 | May 25, 2026 |
| ssh · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.15 | ssh 1:8.9p1-3ubuntu0.15 | Apr 2, 2026 |
| ssh · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.16 | ssh 1:9.6p1-3ubuntu13.16 | Apr 2, 2026 |
| ssh · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | ssh 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| ssh · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | ssh 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
| ssh-askpass-gnome · Ubuntu 22.04.1 LTS (jammy) | 1:8.9p1-3ubuntu0.15 | ssh-askpass-gnome 1:8.9p1-3ubuntu0.15 | Apr 2, 2026 |
| ssh-askpass-gnome · Ubuntu 24.04.5 LTS (noble) | 1:9.6p1-3ubuntu13.16 | ssh-askpass-gnome 1:9.6p1-3ubuntu13.16 | Apr 2, 2026 |
| ssh-askpass-gnome · Ubuntu 25.10 (questing) | 1:10.0p1-5ubuntu5.4 | ssh-askpass-gnome 1:10.0p1-5ubuntu5.4 | Apr 2, 2026 |
| ssh-askpass-gnome · Ubuntu 26.04.1 LTS (resolute) | 1:10.2p1-2ubuntu3.2 | ssh-askpass-gnome 1:10.2p1-2ubuntu3.2 | Apr 2, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.