Critical 9.6Published Aug 20, 2026

CVE-2026-11861Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships

Updated under an hour ago (Oct 28, 2026, 7:30 AM ET)

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It affects Red Hat Enterprise Linux 10 and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 10

Exploited in the last 30 days

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: 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-266
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:4.13.4-1.el10_2 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:4.12.2-15.el10_0.7 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support redhat:rhel_aus	from 8060020261008134123.c1533a64 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support redhat:rhel_eus_long_life	from 8060020261008134123.c1533a64 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service redhat:rhel_e4s	from 8080020261007080925.e581a9e4 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service redhat:rhel_tus	from 8080020261007080925.e581a9e4 not affected	CNA record
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:4.12.2-14.el9_6.8 not affected	CNA record
freeipa freeipa freeipa:freeipa	before 4.13.3	NVD
redhat enterprise_linux redhat:enterprise_linux	7.0; 8.0; 9.0; 10.0	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:70564	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:72279	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:82935	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:83083	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:83084	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:83085	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:83460	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:83461	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:89836	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-11861	vdb-entry, x-refsource-redhat, vendor-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.