CVE-2026-11861

A flaw was found in FreeIPA. When a trust relationship is configured between FreeIPA and Active Directory, Active Directory users can bypass authentication for FreeIPA services, including the portal, SMB server, and LDAP directory. This is possible by impersonating a client name in the Ticket Granting Service (TGS) due to FreeIPA services not verifying Privilege Attribute Certificate (PAC) certificates. This vulnerability could allow an authenticated Active Directory user to escalate their privileges within the FreeIPA domain.

• CWE-266

• https://access.redhat.com/errata/RHSA-2026:70564
• https://access.redhat.com/security/cve/CVE-2026-11861Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2487472Issue Tracking, Vendor Advisory

Published

Aug 20, 2026

Last Modified

Sep 24, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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