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.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-11861	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2487472	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:freeipa:freeipa:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-08-20 11:16

Updated : 2026-08-24 18:14

NVD link : CVE-2026-11861

Mitre link : CVE-2026-11861

CVE.ORG link : CVE-2026-11861

JSON object : View

Products Affected

redhat

enterprise_linux

freeipa

freeipa

CWE

CWE-266

Incorrect Privilege Assignment

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