Public vulnerability disclosure

CVE-2026-11861

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

publishedCWE-266

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.

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Technical severity9.6 criticalCVSS 3.1 · CNA: redhat

Published2026-08-20Source updated 2026-11-02

Collected2026-11-022 attributed sources

Fixes and workarounds

Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Enterprise Linux 10 Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13.4-1.el10_2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.12.2-15.el10_0.7; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.6.8-5.el7_9.25; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8100020261007071200.143e9e98; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8100020261007070536.823393f5; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8040020261027121250.f153676a; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8040020261027121355.5b01ab7e; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8040020261027121250.f153676a; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8040020261027121355.5b01ab7e; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020261008134123.c1533a64; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020261008133528.ada582f1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020261008134123.c1533a64; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8060020261008133528.ada582f1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020261007080925.e581a9e4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020261007071832.b0a6ceea; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `idm:client` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020261007080925.e581a9e4; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `idm:DL1` https://access.redhat.com/downloads/content/package-browser/	≥ 8080020261007071832.b0a6ceea; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.13.4-1.el9_8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.10.1-12.el9_2.7; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.11.0-15.el9_4.9; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.12.2-14.el9_6.8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `ipa` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 9.6 critical	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:70564CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72279CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:82935CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83083CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83084CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83085CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83460CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83461CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:89836CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:93071CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:93452CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-11861CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2487472CNA: redhat · issue-tracking, x_refsource_REDHAT