CVE-2026-35387
openssh-client: OpenSSH before 10.3 can use unintended ECDSA algorithms
CVE-2026-35387 is fixed in 22 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
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0024
15th percentile
OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| openssh · Debian 12.15 (bookworm) | 1:9.2p1-2+deb12u10 | DEBIAN-CVE-2026-35387 | Apr 2, 2026 |
| openssh · Debian 13.5 (trixie) | 1:10.0p1-7+deb13u3 | DEBIAN-CVE-2026-35387 | Apr 2, 2026 |
| openssh · Debian 14 | 1:10.3p1-1 | DEBIAN-CVE-2026-35387 | 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 · 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-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-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 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) | 1:8.9p1-3ubuntu0.15 | 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 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) | 1:8.9p1-3ubuntu0.15 | 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 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) | 1:8.9p1-3ubuntu0.15 | 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 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) | 1:8.9p1-3ubuntu0.15 | 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 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) | 1:8.9p1-3ubuntu0.15 | 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 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) | 1:8.9p1-3ubuntu0.15 | 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.