Read the docs
TI-2026-27550 Aliases CVE-2026-35414GHSA-f6c7-fj8h-5898

OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon…

Priority LOW 35CWE-670Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 28 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00218 12th percentileScored 2026-11-07
Fix Partial OpenSSH (OpenBSD): 10.3Red Hat: 17 advisoriesRed Hat: 28 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenBSDOpenSSHbefore 10.310.3Patch availableCNA
  • OpenSSH VendorOpenBSD Affected before 10.3 Fixed in 10.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*before 10.3VulnerableOpenBSD
  • cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* Versions before 10.3 Vulnerable ·OpenBSD

Remediation

  • Fix · CNA OpenSSH (OpenBSD) Fixed in 10.3

Red Hat 17 advisories

  • RHSA-2026:74674 Released 2026-10-01 · Red Hat rating Important
    Red Hat AI Base Images 3.4.3 (Neuron)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-neuron-rhel9
  • RHSA-2026:58981 Released 2026-08-24 · Red Hat rating Critical
    Red Hat Update Infrastructure 5.3 Technology Preview security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-tp-rhel9, registry.redhat.io/rhui5/installer-tp-rhel9, registry.redhat.io/rhui5/rhua-tp-rhel9
  • RHSA-2026:25096 Released 2026-06-10 · Red Hat rating Important
    Red Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda)
    • Red Hat AI Inference Server 3.2 registry.redhat.io/rhaiis/model-opt-cuda-rhel9
Show 14 more Red Hat advisories
  • RHSA-2026:22564 Released 2026-06-03 · Red Hat rating Important
    openssh update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) openssh-askpass-8.7p1-38.el9_4.8, pam_ssh_agent_auth-0.10.4-5.38.el9_4.8
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) openssh-8.7p1-38.el9_4.8, openssh-clients-8.7p1-38.el9_4.8, openssh-keycat-8.7p1-38.el9_4.8 +1
  • RHSA-2026:22648 Released 2026-06-02 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) openssh-askpass-8.7p1-30.el9_2.11, pam_ssh_agent_auth-0.10.4-5.30.el9_2.11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) openssh-8.7p1-30.el9_2.11, openssh-clients-8.7p1-30.el9_2.11, openssh-keycat-8.7p1-30.el9_2.11 +1
  • RHSA-2026:22329 Released 2026-06-01 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) openssh-8.0p1-7.el8_4.2, openssh-clients-8.0p1-7.el8_4.2, openssh-server-8.0p1-7.el8_4.2
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) openssh-8.0p1-7.el8_4.2, openssh-clients-8.0p1-7.el8_4.2, openssh-server-8.0p1-7.el8_4.2
  • RHSA-2026:21398 Released 2026-05-27 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) openssh-askpass-8.0p1-15.el8_6.5
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) openssh-askpass-8.0p1-15.el8_6.5
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) openssh-askpass-8.0p1-15.el8_6.5
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) openssh-8.0p1-15.el8_6.5, openssh-cavs-8.0p1-15.el8_6.5, openssh-clients-8.0p1-15.el8_6.5 +4
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) openssh-8.0p1-15.el8_6.5, openssh-cavs-8.0p1-15.el8_6.5, openssh-clients-8.0p1-15.el8_6.5 +4
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) openssh-8.0p1-15.el8_6.5, openssh-cavs-8.0p1-15.el8_6.5, openssh-clients-8.0p1-15.el8_6.5 +4
  • RHSA-2026:21298 Released 2026-05-27 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) openssh-8.0p1-20.el8_8.4, openssh-clients-8.0p1-20.el8_8.4, openssh-server-8.0p1-20.el8_8.4
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) openssh-8.0p1-20.el8_8.4, openssh-clients-8.0p1-20.el8_8.4, openssh-server-8.0p1-20.el8_8.4
  • RHSA-2026:21275 Released 2026-05-27 · Red Hat rating Critical
    Red Hat Update Infrastructure 5.1 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9, registry.redhat.io/rhui5/installer-rhel9 +1
  • RHSA-2026:19219 Released 2026-05-19 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream (v. 9) openssh-askpass-9.9p1-7.el9_8, pam_ssh_agent_auth-0.10.4-7.7.el9_8
    • Red Hat Enterprise Linux BaseOS (v. 9) openssh-9.9p1-7.el9_8, openssh-clients-9.9p1-7.el9_8, openssh-keycat-9.9p1-7.el9_8 +1
  • RHSA-2026:19069 Released 2026-05-19 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream (v. 10) openssh-askpass-9.9p1-23.el10_2, openssh-keysign-9.9p1-23.el10_2
    • Red Hat Enterprise Linux BaseOS (v. 10) openssh-9.9p1-23.el10_2, openssh-clients-9.9p1-23.el10_2, openssh-keycat-9.9p1-23.el10_2 +1
  • RHSA-2026:16059 Released 2026-05-11 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) openssh-askpass-8.7p1-45.el9_6.3, pam_ssh_agent_auth-0.10.4-5.45.el9_6.3
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) openssh-8.7p1-45.el9_6.3, openssh-clients-8.7p1-45.el9_6.3, openssh-keycat-8.7p1-45.el9_6.3 +1
  • RHSA-2026:14937 Released 2026-05-07 · Red Hat rating Important
    A Subscription Management tool for finding and reporting Red Hat product usage
    • Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
  • RHSA-2026:13383 Released 2026-05-04 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream (v. 8) openssh-askpass-8.0p1-29.el8_10
    • Red Hat Enterprise Linux BaseOS (v. 8) openssh-8.0p1-29.el8_10, openssh-cavs-8.0p1-29.el8_10, openssh-clients-8.0p1-29.el8_10 +4
  • RHSA-2026:13381 Released 2026-05-04 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream (v. 9) openssh-askpass-8.7p1-49.el9_7, pam_ssh_agent_auth-0.10.4-5.49.el9_7
    • Red Hat Enterprise Linux BaseOS (v. 9) openssh-8.7p1-49.el9_7, openssh-clients-8.7p1-49.el9_7, openssh-keycat-8.7p1-49.el9_7 +1
  • RHSA-2026:13380 Released 2026-05-04 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream (v. 10) openssh-askpass-9.9p1-14.el10_1, openssh-keysign-9.9p1-14.el10_1
    • Red Hat Enterprise Linux BaseOS (v. 10) openssh-9.9p1-14.el10_1, openssh-clients-9.9p1-14.el10_1, openssh-keycat-9.9p1-14.el10_1 +1
  • RHSA-2026:12389 Released 2026-04-30 · Red Hat rating Important
    openssh security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) openssh-askpass-9.9p1-7.el10_0.3, openssh-keysign-9.9p1-7.el10_0.3
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) openssh-9.9p1-7.el10_0.3, openssh-clients-9.9p1-7.el10_0.3, openssh-keycat-9.9p1-7.el10_0.3 +1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OpenBSD OpenSSH 10.3

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-27521 In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an…Priority LOW 38
    • TI-2026-27522 In OpenSSH before 10.3, command execution can occur via shell metacharacters in a…Priority LOW 37
    • TI-2026-27523 OpenSSH before 10.3 can use unintended ECDSA algorithms.Priority LOW 28
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat AI Inference Server 3.2Fixed RHSA-2026:25096
Red Hat Discovery 2Fixed RHSA-2026:14937
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:13380, RHSA-2026:19069
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:13383
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:13381, RHSA-2026:19219
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:21398
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2026:21398
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:22648
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:12389
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:22564
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:16059
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2026:21398
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:13380, RHSA-2026:19069
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:13383
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:13381, RHSA-2026:19219
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:22329
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:21398
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:21398
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:21298
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:22648
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:12389
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:22564
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:16059
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:22329
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:21398
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:21298
Red Hat OpenShift AI 3.4Fixed RHSA-2026:74674
Red Hat Update Infrastructure 5Fixed RHSA-2026:21275, RHSA-2026:58981
Not affected: 22 products
  • Red Hat Discovery 2
  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream E4S (v.8.6)
  • Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • Red Hat Enterprise Linux AppStream TUS (v.8.6)
  • Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • Red Hat Update Infrastructure 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35414
  2. 2026-10-03 Alias added: GHSA-f6c7-fj8h-5898

References

Advisory 2

Other 1

  • TI-2023-19792 The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2023-10601 OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during… CVSS 3.1MEDIUM 6.5
  • TI-2018-11033 OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying… CVSS 3.1MEDIUM 5.9
  • TI-2016-08105 Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4… CVSS 3.1HIGH 7.3
  • TI-2023-28040 In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host… CVSS 3.1MEDIUM 6.5
See all 145 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences