Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-11861

CVE-2026-11861HIGH

Red Hat Red Hat Enterprise Linux 10 — Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  H  N    8.1   .0022   11.6     —

AFFECTED
  Product                      Versions     Fixed
  Red Hat Enterprise Linux 10  unspecified  0:4.13.4-1.el10_2
  Red Hat Enterprise Linux 9   unspecified  0:4.13.4-1.el9_8
  Red Hat Enterprise Linux 6   unspecified  —
  Red Hat Enterprise Linux 7   unspecified  —
  Red Hat Enterprise Linux 8   unspecified  —

TIMELINE
  Jun 10  Reserved by redhat
  Aug 20  Published (CNA: redhat)
  Sep 23  PATCH SHIPPED — CVE-2026-11861 (Red Hat Enterprise Linux 9). Fixed in Red Hat Enterprise Linux 9 0:4.13.4-1.el9_8.

CWE-266 · CNA: redhat · CVSS v3.1 · 4 references · NVD status: Modified

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 10, 2026	Reserved	Reserved by redhat
August 20, 2026	Published	Published (CNA: redhat)
September 23, 2026	PATCH SHIPPED	PATCH SHIPPED — CVE-2026-11861 (Red Hat Enterprise Linux 9). Fixed in Red Hat Enterprise Linux 9 0:4.13.4-1.el9_8.

Affected

Affected products and packages — 5 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat Enterprise Linux 10	—	—	0:4.13.4-1.el10_2
Red Hat	Red Hat Enterprise Linux 9	—	—	0:4.13.4-1.el9_8
Red Hat	Red Hat Enterprise Linux 6	—	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—	—

Weaknesses

CWE-266

References (4)

https://access.redhat.com/errata/RHSA-2026:70564
https://access.redhat.com/errata/RHSA-2026:72279
https://access.redhat.com/security/cve/CVE-2026-11861 [Vendor Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2487472 [Issue Tracking, Vendor Advisory]

Authoritative record: CVE-2026-11861 at cve.org

Vendors: red hat

Weaknesses: CWE-266

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-11861 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.