{"id":"CVE-2026-11861","aliases":[],"cve":{"records":[{"id":"CVE-2026-11861","source":"redhat","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-06-10T11:21:33.281Z","published":"2026-08-20T10:39:08.025Z","modified":"2026-10-30T18:43:47.523Z"}],"publishers":[{"name":"redhat","role":"CNA","organizationId":"53f830b8-0a3f-465b-8143-3b8a9948e749","modified":"2026-10-30T18:43:47.523Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-08-20T13:48:25.096Z"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:70564","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:72279","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:82935","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:83083","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:83084","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:83085","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:83460","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:83461","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:89836","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/errata/RHSA-2026:93071","tags":["vendor-advisory","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-11861","tags":["vdb-entry","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487472","tags":["issue-tracking","x_refsource_REDHAT"],"source":"redhat"}],"weaknesses":[{"id":"CWE-266","description":"Incorrect Privilege Assignment","source":"redhat"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-08-20T13:48:14.824853Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships","titleSource":"redhat","descriptionSource":"redhat","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.","score":9.6,"severity":"critical","published":"2026-08-20T10:39:08.025Z","modified":"2026-10-30T18:43:47.523Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10","platforms":[],"versions":[{"version":"0:4.13.4-1.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10.0 Extended Update Support","platforms":[],"versions":[{"version":"0:4.12.2-15.el10_0.7","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"},{"vendor":"Red 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Add-On","platforms":[],"versions":[{"version":"8060020261008133528.ada582f1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","platforms":[],"versions":[{"version":"8080020261007080925.e581a9e4","status":"unaffected","lessThan":"*","versionType":"rpm"}],"defaultStatus":"affected","cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8.8 Telecommunications Update 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stability.","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"}],"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/errata/RHSA-2026:89836","https://access.redhat.com/errata/RHSA-2026:93071","https://access.redhat.com/security/cve/CVE-2026-11861","https://bugzilla.redhat.com/show_bug.cgi?id=2487472"],"sources":[{"name":"CVE","id":"CVE-2026-11861","modified":"2026-10-30T18:43:47.523Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"}],"assessments":[{"source":"redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","score":9.6}],"sourceAffected":[],"observedAt":"2026-10-30T18:57:00.171Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T14:10:32.801Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"A flaw in FreeIPA allows authenticated Active Directory users to bypass authentication and escalate privileges within the FreeIPA domain when a trust relationship is configured. The vulnerability occurs due to FreeIPA services not verifying Privilege Attribute Certificate (PAC) certificates. Affected versions are not explicitly stated, but various Red Hat Enterprise Linux versions are listed with 'unaffected' or 'unknown' status.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T10:06:09.129Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-11861"}]}}