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CVE

CVE-2026-11861

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

CVE-2026-11861

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://access.redhat.com/downloads/content/package-browser/, 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, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11861.json, https://nvd.nist.gov/vuln/detail/CVE-2026-11861, https://bugzilla.redhat.com/show_bug.cgi?id=2487472

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00231%
EPSS Percentile
0.12581%
Introduced Version
0
Fix Available
3af131529c795764b27dca04ce0097db043d355a,0:4.13.4-1.el9_8,4.13.4-1.el10_2,0:4.13.4-1.0.1.el10_2,0:4.13.4-1.0.1.el9_8,0:4.6.8-5.amzn2.17.5,4.13.3-r0

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