Interpretation Conflict in OpenSSH - CVE-2026-106587
Published: October 28, 2026 / Updated: October 28, 2026
Vulnerability identifier: #VU158346
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-106587
CWE-ID: CWE-436
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to potentially bypass intended authentication policy by causing a file lookup that should have been disabled.
The vulnerability exists due to incorrect interpretation of configuration values in sshd when a Match block overrides an option such as AuthorizedPrincipalsFile with the value of "none". A remote attacker can attempt authentication under the affected configuration to potentially have sshd consult a literal file named none instead of disabling the configured file source.
Affected software
OpenSSH
How to mitigate CVE-2026-106587
Install security update from vendor's website.
OpenSSH - update to 10.6p1