CVE-2026-59851

Published: Jul 21, 2026Modified: Jul 21, 2026

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: secalert@redhat.com (Secondary)

Description

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users.

Related CWEs

CWE-863

Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

References (2)

https://access.redhat.com/security/cve/CVE-2026-59851

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2498184

Source: secalert@redhat.com

Timeline

No history available yet.