CVE-2026-76560

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The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client's empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Directory Server 11.5 E4S for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "redhat-ds:11", "defaultStatus": "affected", "versions": [{"version": "8060020260908152739.0ca98e7e", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:directory_server_e4s:11.5::el8"]}, {"vendor": "Red Hat", "product": "Red Hat Directory Server 11.7 E4S for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "redhat-ds:11", "defaultStatus": "affected", "versions": [{"version": "8080020260903102346.f969626e", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": 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Where anonymous binds are not required, disabling anonymous access to the directory removes the attack surface entirely."}], "timeline": [{"lang": "en", "time": "2026-08-15T16:11:15.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-09-07T12:00:00.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Gia Bui (yabeow) (Calif.io) for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-04T23:32:47.413Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T12:53:18.327856Z", "id": "CVE-2026-76560", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T12:53:26.192Z"}}]}}

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This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user."}], "id": "CVE-2026-76560", "lastModified": "2026-11-05T00:17:27.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-76560", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-08T12:53:18.327856Z", "version": "2.0.3"}}]}, "published": "2026-09-07T14:16:54.197", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64771"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64776"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64778"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64779"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64780"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64781"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64783"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64784"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64785"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64789"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64790"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64791"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64792"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64793"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:64804"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:65119"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:79217"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-76560"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519521"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Gia Bui (yabeow) (Calif.io) for reporting this issue.", "bugzilla": {"description": "389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN", "id": "2519521", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519521"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-863", "details": ["A flaw was found in 389 Directory Server. The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client's empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user."], "mitigation": {"lang": "en:us", "value": "Until a fix is available, review all ACIs using userattr=\"...#SELFDN\" bind rules and confirm the target attribute cannot be set to an empty value, or add an explicit authmethod restriction to the ACI to prevent anonymous binds from satisfying the check. Where anonymous binds are not required, disabling anonymous access to the directory removes the attack surface entirely."}, "name": "CVE-2026-76560", "package_state": [{"cpe": "cpe:/a:redhat:directory_server:11", "fix_state": "Affected", "package_name": "389-ds-base", "product_name": "Red Hat Directory Server 11"}, {"cpe": "cpe:/a:redhat:directory_server:11", "fix_state": "Affected", "package_name": "redhat-ds:11/389-ds-base", "product_name": "Red Hat Directory Server 11"}, {"cpe": "cpe:/a:redhat:directory_server:12", "fix_state": "Affected", "package_name": "389-ds-base", "product_name": "Red Hat Directory Server 12"}, {"cpe": "cpe:/a:redhat:directory_server:12", "fix_state": "Affected", "package_name": "redhat-ds:12/389-ds-base", "product_name": "Red Hat Directory Server 12"}, {"cpe": "cpe:/a:redhat:directory_server:13", "fix_state": "Not affected", "package_name": "389-ds-base", "product_name": "Red Hat Directory Server 13"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "389-ds-base", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "389-ds-base", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "389-ds-base", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "389-ds:1.4/389-ds-base", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "389-ds-base", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "389-ds-base", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-07T12:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-76560\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-76560"], "statement": "This flaw affects any 389 Directory Server (or Red Hat Directory Server) deployment that defines an ACI using a userattr=\"attribute#SELFDN\" or userattr=\"attribute#USERDN\" bind rule on an attribute that is permitted to hold an explicit empty value. Red Hat Directory Server does not ship such an ACI by default; real-world impact depends on whether a specific deployment or consuming application defines an ACI of this shape.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Directory Server 11", "source": "cna", "vendor": "Red Hat"}, "product": "directory_server", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}], "created": "2026-09-07T15:00:14.027425+00:00", "updated": "2026-09-08T20:37:03.234766+00:00", "vendors": ["redhat", "redhat$PRODUCT$directory_server", "redhat$PRODUCT$enterprise_linux"]}