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The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services."}], "id": "CVE-2026-76578", "lastModified": "2026-10-15T06:17:04.403", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-76578", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T13:58:12.782701Z", "version": "2.0.3"}}]}, "published": "2026-09-07T13:20:36.850", "references": [{"source": "secalert@redhat.com", "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/security/cve/CVE-2026-76578"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519522"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-306"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Gia Bui (yabeow) (Calif.io) for reporting this issue.", "bugzilla": {"description": "ipa: freeipa: FreeIPA: unauthenticated LDAP client can obtain administrator credentials via the self-managed-token ACI", "id": "2519522", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519522"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-306", "details": ["A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services."], "mitigation": {"lang": "en:us", "value": "Until a fixed package is available, restrict network access to the LDAP service (typically ports 389/636) to trusted hosts only, using firewall rules or network segmentation. Disabling anonymous LDAP binds blocks this specific attack path, though administrators should confirm this does not break other required anonymous-bind functionality in their deployment before applying it."}, "name": "CVE-2026-76578", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "ipa", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "ipa", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "ipa", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "idm:client/ipa", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "ipa", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "ipa", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-07T11:46:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-76578\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-76578"], "statement": "This is a Critical flaw allowing complete, unauthenticated compromise of a FreeIPA/IdM server's administrative privileges. The technique originally disclosed impersonated the literal admin account via a canonical-name collision; a separate prior fix (CVE-2026-13097) now blocks that specific collision but does not address the underlying unauthenticated write access. The attack still succeeds by having the anonymously-created principal added to the administrators group under an attacker-chosen name, reaching the same practical outcome. Exploitation of the original collision-based technique has been independently confirmed by Red Hat against a default, unmodified FreeIPA installation and requires no credentials, user interaction, or prior access, only network reachability to the LDAP service. Any FreeIPA/IdM deployment exposing LDAP to an untrusted network should be considered at immediate risk until patched.", "threat_severity": "Critical"}

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