CVE-2026-40683

{"id": "CVE-2026-40683", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40683", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-14T20:14:37.459439Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 5.3, "exploitabilityScore": 1.8}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "OpenStack", "product": "Keystone", "versions": [{"status": "affected", "version": "8.0.0", "lessThan": "25.0.1", "versionType": "semver"}, {"status": "affected", "version": "26.0.0", "lessThan": "26.1.1", "versionType": "semver"}, {"status": "affected", "version": "27.0.0", "lessThan": "27.0.1", "versionType": "semver"}, {"status": "affected", "version": "28.0.0", "lessThan": "28.0.1", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-04-14T20:16:48.203", "references": [{"url": "https://bugs.launchpad.net/keystone/+bug/2121152", "source": "cve@mitre.org"}, {"url": "https://bugs.launchpad.net/keystone/+bug/2141713", "source": "cve@mitre.org"}, {"url": "https://review.opendev.org/958205", "source": "cve@mitre.org"}, {"url": "https://www.openwall.com/lists/oss-security/2026/04/14/9", "source": "cve@mitre.org"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-843"}]}], "descriptions": [{"lang": "en", "value": "In OpenStack Keystone before 28.0.1, the LDAP identity backend does not convert the user enabled attribute to a boolean when the user_enabled_invert configuration option is False (the default). The _ldap_res_to_model method in the UserApi class only performed string-to-boolean conversion when user_enabled_invert was True. When False, the raw string value from LDAP (e.g., \"FALSE\") was used directly. Since non-empty strings are truthy in Python, users marked as disabled in LDAP were treated as enabled by Keystone, allowing them to authenticate and perform actions. All deployments using the LDAP identity backend without user_enabled_invert=True or user_enabled_emulation are affected."}, {"lang": "es", "value": "En OpenStack Keystone anterior a 28.0.1, el backend de identidad LDAP no convierte el atributo enabled del usuario a un booleano cuando la opci\u00f3n de configuraci\u00f3n user_enabled_invert es False (el valor predeterminado). El m\u00e9todo _ldap_res_to_model en la clase UserApi solo realizaba la conversi\u00f3n de cadena a booleano cuando user_enabled_invert era True. Cuando era False, el valor de cadena sin procesar de LDAP (por ejemplo, 'FALSE') se usaba directamente. Dado que las cadenas no vac\u00edas son truthy en Python, los usuarios marcados como deshabilitados en LDAP eran tratados como habilitados por Keystone, permiti\u00e9ndoles autenticarse y realizar acciones. Todas las implementaciones que utilizan el backend de identidad LDAP sin user_enabled_invert=True o user_enabled_emulation se ven afectadas."}], "lastModified": "2026-07-24T21:10:00.143", "sourceIdentifier": "cve@mitre.org"}