CVE-2026-11861
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.
Key facts
- CVSS score
- 9.6 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N- Weakness (CWE)
- CWE-266
- EPSS score
- 0.4% (27th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2026-63245)
- Published
- August 20, 2026
- NVD last modified
- October 15, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-63245 in the EU Vulnerability Database. Last updated in EUVD on October 15, 2026.
View on the EU Vulnerability DatabaseAffected products
- freeipa / freeipa
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux
Certified products that may be affected
31 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5445 - active
- Red Hat Enterprise Linux 9 libgcrypt - Red Hat, Inc. - FIPS 140 5366 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
See all 31 in the Security Certifications Explorer.
References
- https://access.redhat.com/errata/RHSA-2026:70564
- https://access.redhat.com/errata/RHSA-2026:72279
- https://access.redhat.com/errata/RHSA-2026:82935
- https://access.redhat.com/errata/RHSA-2026:83083
- https://access.redhat.com/errata/RHSA-2026:83084
- https://access.redhat.com/errata/RHSA-2026:83085
- https://access.redhat.com/errata/RHSA-2026:83460
- https://access.redhat.com/errata/RHSA-2026:83461
- https://access.redhat.com/security/cve/CVE-2026-11861(Vendor Advisory)
- https://bugzilla.redhat.com/show_bug.cgi?id=2487472(Issue Tracking, Vendor Advisory)
Last updated October 16, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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