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CVE-2026-11861

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

HIGH
8.1
CVSS Score
Published: August 20, 2026 at 10:39 AM UTC
Updated: November 2, 2026 at 04:16 AM UTC
2 products affected across 2 vendorsEnterprise LinuxFreeIPA

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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FreeIPA· Freeipa
95%
v < 4.13.3
Affected range stops below 4.13.3, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
10.07.08.09.0
Vendor states this is fixed in 0:4.10.1-12.el9_2.7 (unaffected)
Vendor states this is fixed in 0:4.11.0-15.el9_4.9 (unaffected)
Vendor states this is fixed in 0:4.12.2-14.el9_6.8 (unaffected)
Vendor states this is fixed in 0:4.12.2-15.el10_0.7 (unaffected)
Vendor states this is fixed in 0:4.13.4-1.el10_2 (unaffected)
Vendor states this is fixed in 0:4.13.4-1.el9_8 (unaffected)
Vendor states this is fixed in 8080020261007071832.b0a6ceea (unaffected)
Vendor states this is fixed in 8080020261007080925.e581a9e4 (unaffected)
Vendor states this is fixed in 8100020261007070536.823393f5 (unaffected)
Vendor states this is fixed in 8100020261007071200.143e9e98 (unaffected)
Vendor states this is fixed in 6 (unknown)

References (13)

VDB Entryx_refsource_REDHATVendor Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-11861
Issue Trackingx_refsource_REDHATVendor Advisory
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2487472
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:70564
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:72279
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:82935
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:83083
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:83085
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:83084

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-266

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