CVE-2026-11861

Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships

State: Published
Severity: 9.6 Critical
Published: Aug 20, 2026
Updated: Nov 2, 2026
Reserved: Jun 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.6 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N	redhat

Weaknesses

CWE-266 Incorrect Privilege Assignment

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:4.13.4-1.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:4.12.2-15.el10_0.7 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat	0:4.6.8-5.el7_9.25 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	8100020261007071200.143e9e98 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	8100020261007070536.823393f5 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	8040020261027121250.f153676a and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	8040020261027121355.5b01ab7e and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat	8040020261027121250.f153676a and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat	8040020261027121355.5b01ab7e and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	8060020261008134123.c1533a64 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	8060020261008133528.ada582f1 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	8060020261008134123.c1533a64 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	8060020261008133528.ada582f1 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	8080020261007080925.e581a9e4 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	8080020261007071832.b0a6ceea and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	8080020261007080925.e581a9e4 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	8080020261007071832.b0a6ceea and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:4.13.4-1.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:4.10.1-12.el9_2.7 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:4.11.0-15.el9_4.9 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:4.12.2-14.el9_6.8 and laterNot affected
Red Hat Enterprise Linux 6Red Hat

References

RHSA-2026:70564vendor-advisory
RHSA-2026:72279vendor-advisory
RHSA-2026:82935vendor-advisory
RHSA-2026:83083vendor-advisory
RHSA-2026:83084vendor-advisory
RHSA-2026:83085vendor-advisory
RHSA-2026:83460vendor-advisory
RHSA-2026:83461vendor-advisory
RHSA-2026:89836vendor-advisory
RHSA-2026:93071vendor-advisory
RHSA-2026:93452vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-11861vdb-entry
RHBZ#2487472issue-tracking

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