Improper initialization in OpenSSH - CVE-2026-106555
Published: October 28, 2026
Vulnerability identifier: #VU158340
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-2026-106555
CWE-ID: CWE-665
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause authentication state from an earlier attempt to affect a later attempt, potentially producing incorrect authentication decisions.
The vulnerability exists due to improper reinitialization of GSSAPI authentication state in sshd when processing successive authentication attempts. A remote attacker can initiate multiple authentication attempts to cause stale state to be confused with the state of a later attempt.
Affected software
OpenSSH
How to mitigate CVE-2026-106555
Install security update from vendor's website.
OpenSSH - update to 10.6p1