What is CVE-2026-11861?

CVE-2026-11861 is a critical-severity vulnerability in Red Hat Enterprise Linux 10, classified under Incorrect Privilege Assignment. CVSS score: 9.6/10. Published 2026-08-20.

How severe is CVE-2026-11861?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Privilege escalation in Red Hat Enterprise Linux 10

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 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

CWE-266 — Incorrect Privilege Assignment

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-11861?: CVE-2026-11861 is a critical-severity vulnerability in Red Hat Enterprise Linux 10, classified under Incorrect Privilege Assignment. CVSS score: 9.6/10. Published 2026-08-20.
How severe is CVE-2026-11861?: Critical severity. CVSS v3 base score is 9.6 out of 10.