Description
OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenBSD | OpenSSH | < 10.3 | 10.3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssh | 1:10.3p1-1 | — |
| Debian 13 | openssh | 1:10.0p1-7+deb13u3 | — |
| Debian 12 | openssh | 1:9.2p1-2+deb12u10 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | openssh-ssh1 | No fix yet | — |
| Ubuntu 26.04 LTS | openssh | 1:10.2p1-2ubuntu3.2 | — |
| Ubuntu 26.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 25.10 | openssh | 1:10.0p1-5ubuntu5.4 | — |
| Ubuntu 25.10 | openssh-ssh1 | No fix yet | — |
| Ubuntu 24.04 LTS | openssh | 1:9.6p1-3ubuntu13.16 | — |
| Ubuntu 24.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 22.04 LTS | openssh | 1:8.9p1-3ubuntu0.15 | — |
| Ubuntu 22.04 LTS | openssh-ssh1 | No fix yet | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu 18.04 LTS | openssh-ssh1 | No fix yet | — |
| Ubuntu Pro FIPS 20.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | openssh | No fix yet | — |
| Ubuntu Pro 20.04 LTS | openssh | 1:8.2p1-4ubuntu0.13+esm3 | USN-8804-1 |
| Ubuntu Pro 18.04 LTS | openssh | 1:7.6p1-4ubuntu0.7+esm6 | USN-8804-1 |
| Ubuntu Pro 16.04 LTS | openssh | 1:7.2p2-4ubuntu2.10+esm9 | USN-8804-1, USN-8577-1 |
| Ubuntu Pro 14.04 LTS | openssh | 1:6.6p1-2ubuntu2.13+esm4 | USN-8804-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | openssh +5 | 9.9p1-14.el10_1 | RHSA-2026:19069, RHSA-2026:13380 |
| RHEL 9 | openssh +4 | 8.7p1-49.el9_7 | RHSA-2026:19219, RHSA-2026:13381 |
| RHEL 9 | pam_ssh_agent_auth | 0.10.4-5.49.el9_7 | RHSA-2026:19219, RHSA-2026:13381 |
| RHEL 8 | openssh +6 | 8.0p1-29.el8_10 | RHSA-2026:13383 |
| RHEL 8 | pam_ssh_agent_auth | 0.10.3-7.29.el8_10 | RHSA-2026:13383 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | openssh +5 | 9.9p1-7.el10_0.3 | RHSA-2026:12389 |
| RHEL 9.6 EUS | openssh +4 | 8.7p1-45.el9_6.3 | RHSA-2026:16059 |
| RHEL 9.6 EUS | pam_ssh_agent_auth | 0.10.4-5.45.el9_6.3 | RHSA-2026:16059 |
| RHEL 9.4 EUS | openssh +4 | 8.7p1-38.el9_4.8 | RHSA-2026:22564 |
| RHEL 9.4 EUS | pam_ssh_agent_auth | 0.10.4-5.38.el9_4.8 | RHSA-2026:22564 |
| RHEL 9.2 E4S | openssh +4 | 8.7p1-30.el9_2.11 | RHSA-2026:22648 |
| RHEL 9.2 E4S | pam_ssh_agent_auth | 0.10.4-5.30.el9_2.11 | RHSA-2026:22648 |
| RHEL 8.8 TUS | openssh +2 | 8.0p1-20.el8_8.4 | RHSA-2026:21298 |
| RHEL 8.8 E4S | openssh +2 | 8.0p1-20.el8_8.4 | RHSA-2026:21298 |
| RHEL 8.6 TUS | openssh +6 | 8.0p1-15.el8_6.5 | RHSA-2026:21398 |
| RHEL 8.6 TUS | pam_ssh_agent_auth | 0.10.3-7.15.el8_6.5 | RHSA-2026:21398 |
| RHEL 8.6 E4S | openssh +6 | 8.0p1-15.el8_6.5 | RHSA-2026:21398 |
| RHEL 8.6 E4S | pam_ssh_agent_auth | 0.10.3-7.15.el8_6.5 | RHSA-2026:21398 |
| RHEL 8.6 AUS | openssh +6 | 8.0p1-15.el8_6.5 | RHSA-2026:21398 |
| RHEL 8.6 AUS | pam_ssh_agent_auth | 0.10.3-7.15.el8_6.5 | RHSA-2026:21398 |
| RHEL 8.4 EUS Long Life | openssh +2 | 8.0p1-7.el8_4.2 | RHSA-2026:22329 |
| RHEL 8.4 AUS | openssh +2 | 8.0p1-7.el8_4.2 | RHSA-2026:22329 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | openssh +5 | 9.9p1-14.el10_1.alma.1 | ALSA-2026:19069, ALSA-2026:13380 |
| AlmaLinux 9 | openssh +4 | 8.7p1-49.el9_7.alma.1 | ALSA-2026:19219, ALSA-2026:13381 |
| AlmaLinux 9 | pam_ssh_agent_auth | 0.10.4-5.49.el9_7.alma.1 | ALSA-2026:19219, ALSA-2026:13381 |
| AlmaLinux 8 | openssh +6 | 8.0p1-29.el8_10 | ALSA-2026:13383 |
| AlmaLinux 8 | pam_ssh_agent_auth | 0.10.3-7.29.el8_10 | ALSA-2026:13383 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | openssh | 9.9p1-14.el10_1.rocky.0.1 | RLSA-2026:19069, RLSA-2026:13380 |
| Rocky Linux 9 | openssh | 8.7p1-49.el9_7.rocky.0.1 | RLSA-2026:19219, RLSA-2026:13381 |
| Rocky Linux 8 | openssh | 8.0p1-29.el8_10 | RLSA-2026:13383 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | openssh +1 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 |
| SLES 15 SP6 | openssh +1 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 |
| SLES 15 SP5 | openssh +1 | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLES 15 SP4 | openssh +1 | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLES 12 SP5 | openssh +1 | 7.2p2-81.40.1 | SUSE-SU-2026:2395-1 |
| SLES 12 SP5 | openssh8.4 | 8.4p1-8.24.1 | SUSE-SU-2026:2430-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | openssh +1 | 6.6p1-36.31.1 | SUSE-SU-2026:2515-1 |
| SLES for SAP 15 SP6 | openssh +1 | 9.6p1-150600.6.42.1 | SUSE-SU-2026:2371-1 |
| SLES for SAP 15 SP5 | openssh +1 | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLES for SAP 15 SP4 | openssh +1 | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLE Micro 6.0 | openssh | 9.6p1-6.1 | SUSE-SU-2026:23249-1 |
| SLE Micro 5.5 | openssh | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLE Micro 5.4 | openssh | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLE Micro 5.3 | openssh | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLE HPC 15 SP5 | openssh +1 | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
| SLE HPC 15 SP4 | openssh +1 | 8.4p1-150300.3.65.1 | SUSE-SU-2026:2375-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssh | 10.3p1-4.1 | openSUSE-SU-2026:10804-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssh +3 | 8.7p1-8.amzn2023.0.18 | ALAS2023-2026-1745 |
| Amazon Linux 2023 | pam_ssh_agent_auth | 0.10.4-4.8.amzn2023.0.18 | ALAS2023-2026-1745 |
| Amazon Linux 2 | openssh +7 | 7.4p1-22.amzn2.0.13 | ALAS2-2026-3320 |
| Amazon Linux 2 | pam_ssh_agent_auth | 0.10.3-2.22.amzn2.0.13 | ALAS2-2026-3320 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openssh | 9.8p1-8 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | openssh +5 | 9.9p1-14.0.1.el10_1 | ELSA-2026-19069, ELSA-2026-13380 |
| Oracle Linux 9 | openssh +4 | 8.7p1-49.0.1.el9_7 | ELSA-2026-19219, ELSA-2026-13381 |
| Oracle Linux 9 | pam_ssh_agent_auth | 0.10.4-5.49.0.1.el9_7 | ELSA-2026-19219, ELSA-2026-13381 |
| Oracle Linux 8 | openssh +6 | 8.0p1-29.0.1.el8_10 | ELSA-2026-13383 |
| Oracle Linux 8 | pam_ssh_agent_auth | 0.10.3-7.29.0.1.el8_10 | ELSA-2026-13383 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
killercd/CVE-2026-35414 ★ 1 · Apr 29, 2026
CVE-2026-35414 Vuln block
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 41
- ALSA-2026:13380 Important: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19219 Important: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:13381 Important: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19069 Important: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:13383 Important: openssh security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:22648 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22564 Red Hat Security Advisory: openssh update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22329 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:21398 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:21298 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:19219 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:19069 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:16059 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:13381 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:13383 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:13380 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:12389 Red Hat Security Advisory: openssh security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- USN-8804-1 openssh vulnerabilities Ubuntu Security Notices (USN) · Sep 22, 2026
- WID-SEC-2026-0979 OpenSSH: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 22, 2026
- WID-SEC-2026-2253 IBM Security Verify Access: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- SUSE-SU-2026:23249-1 Security update for openssh SUSE / openSUSE Security Updates · Aug 27, 2026
- WID-SEC-2026-1666 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 28, 2026
- USN-8577-1 openssh vulnerability Ubuntu Security Notices (USN) · Jul 21, 2026
- ELSA-2026-19069 Important: openssh security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- SUSE-SU-2026:2515-1 Security update for openssh, openssh-askpass-gnome SUSE / openSUSE Security Updates · Jun 24, 2026
- SUSE-SU-2026:2430-1 Security update for openssh8.4 SUSE / openSUSE Security Updates · Jun 18, 2026
- SUSE-SU-2026:2395-1 Security update for openssh SUSE / openSUSE Security Updates · Jun 16, 2026
- SUSE-SU-2026:2371-1 Security update for openssh SUSE / openSUSE Security Updates · Jun 12, 2026
- SUSE-SU-2026:2375-1 Security update for openssh SUSE / openSUSE Security Updates · Jun 12, 2026
- ELSA-2026-19219 Important: openssh security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 12, 2026
- RLSA-2026:19069 Important: openssh security update Rocky Linux Security Advisories · May 29, 2026
- RLSA-2026:19219 Important: openssh security update Rocky Linux Security Advisories · May 28, 2026
- ALAS2-2026-3320 Moderate: openssh security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 26, 2026
- ALAS2023-2026-1745 Moderate: openssh security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 26, 2026
- RLSA-2026:13380 Important: openssh security update Rocky Linux Security Advisories · May 21, 2026
- RLSA-2026:13381 Important: openssh security update Rocky Linux Security Advisories · May 21, 2026
- openSUSE-SU-2026:10804-1 openssh-10.3p1-4.1 on GA media SUSE / openSUSE Security Updates · May 19, 2026
- RLSA-2026:13383 Important: openssh security update Rocky Linux Security Advisories · May 6, 2026
- ELSA-2026-13381 Important: openssh security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 5, 2026
- ELSA-2026-13383 Important: openssh security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2026
- ELSA-2026-13380 Important: openssh security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · May 5, 2026