Severity by source
Sources disagree (Medium–Critical)AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Network-reachable FreeIPA services accept forged PAC tickets from any authenticated AD user (PR:L); no interaction or elevated complexity is required beyond the trust configuration prerequisite, and no availability impact is described.
vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
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.
AnalysisAI
FreeIPA's Kerberos Ticket Granting Service fails to verify Privilege Attribute Certificate (PAC) signatures when processing cross-realm tickets from a trusted Active Directory domain, allowing any authenticated AD user to impersonate arbitrary FreeIPA principals. This grants unauthorized elevated access to FreeIPA services including the web portal, SMB server, and LDAP directory. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Two specific conditions must be simultaneously present: (1) an explicitly configured cross-realm trust relationship between FreeIPA and an Active Directory domain - this is a non-default administrative configuration that must be deliberately established; and (2) an authenticated Active Directory account in the trusted AD domain (reflected in CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N) reflects network-accessible exploitation requiring only a low-privilege AD account, with high confidentiality and integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No specific patched FreeIPA package version has been confirmed in the available data - patch availability and exact fix versions must be verified directly through the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-11861 and Bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=2487472; apply available RHEL FreeIPA package updates as soon as a fix is released. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all FreeIPA deployments with configured Active Directory cross-realm trusts and document deployed versions and which critical services depend on these trusts. …
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View allVendor StatusVendor
SUSE
Severity: CriticalShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-63245
GHSA-g67c-jg9c-rqh2