{"id":"CVE-2026-11861","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-11861","generatedAt":"2026-10-28T03:39:16.326Z","title":"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.","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.","published":"2026-08-20T11:16:19.000Z","lastModified":"2026-10-27T10:10:00.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-266"],"affected":["freeipa/freeipa","redhat/enterprise linux"],"epss":{"score":0.0035,"percentile":0.28414,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:70564","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:72279","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:82935","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83083","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83084","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83085","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83460","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83461","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:89836","source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-11861","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487472","tags":["Issue Tracking","Vendor Advisory"],"source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-11861","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}