CVE-2026-106555

Undergoing Analysis Undergoing Analysis - In Progress

BaseFortify

Publication date: 2026-10-06

Last updated on: 2026-10-13

Assigner: MITRE

Description

In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-06

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-07

EPSS Evaluated

2026-10-18

NVD

CVE-2026-106555

Affected Vendors & Products

Vendor	Product	Version / Range
openbsd	openssh	to 10.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-669	The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.

Attack-Flow Graph

Executive Summary

This vulnerability in OpenSSH before version 10.6 allows the GSSAPIAuthentication authentication state to be incorrectly carried over between different authentication attempts. This means that if a user authenticates using GSSAPI, the system might improperly retain that authentication state even for subsequent unrelated authentication sessions.

Detection Guidance

To detect this vulnerability, check the OpenSSH version on your system using 'sshd -T | grep version' or 'ssh -V'. If the version is before 10.6, the system is vulnerable. Inspect sshd logs for unusual authentication persistence patterns.

Impact Analysis

An attacker could exploit this issue to bypass intended authentication restrictions, potentially gaining unauthorized access to systems or services. The low CVSS score suggests limited impact, but improper authentication state persistence could lead to unintended privilege escalation or access in certain configurations.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR, HIPAA, or similar standards as it involves authentication state persistence in OpenSSH. However, improper authentication handling could indirectly affect compliance by failing to meet security controls required by these regulations.

Mitigation Strategies

Upgrade OpenSSH to version 10.6 or later to address the GSSAPIAuthentication state persistence issue.

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