CVE-2026-23906
Vulnerability Description
An authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous binds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.
The vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication.
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Impact
Mitigation
Detalles técnicos trazas, registros y código del informe original
Affected Products and Versions * Apache Druid * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0) * Prerequisites: * druid-basic-security extension enabled * LDAP authenticator configured * Underlying LDAP server permits anonymous bind A remote, unauthenticated attacker can: * Gain unauthorized access to the Apache Druid cluster * Access sensitive data stored in Druid datasources * Execute queries and potentially manipulate data * Access administrative interfaces if the bypassed account has elevated privileges * Completely compromise the confidentiality, integrity, and availability of the Druid deployment Immediate Mitigation (No Druid Upgrade Required): * Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action. Resolution * Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.05%
- Percentil entre todas las CVEs puntuadas: 63
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1078Valid Accountsstealth · persistence · privilege escalation · initial access95 % - Impacto secundario
T1005Data from Local Systemcollection85 % - Impacto secundario
T1565.001Stored Data Manipulationimpact80 %
CVSS AV:N/PR:N/UI:N → T1190. Bypass LDAP anonimo otorga acceso no autorizado (T1078), lectura de datos (T1565.001 por manipulación mediante queries), según descripción de impacto.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-287
Referencias
JSON original (NVD)
Mostrar
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"value": "Affected Products and Versions\n * Apache Druid\n * Affected Versions: 0.17.0 through 35.x (all versions prior to 36.0.0)\n * Prerequisites: * druid-basic-security extension enabled\n * LDAP authenticator configured\n * Underlying LDAP server permits anonymous bind \n\n\n\n\n\n\nVulnerability Description\n\nAn authentication bypass vulnerability exists in Apache Druid when using the druid-basic-security extension with LDAP authentication. If the underlying LDAP server is configured to allow anonymous\nbinds, an attacker can bypass authentication by providing an existing username with an empty password. This allows unauthorized access to otherwise restricted Druid resources without valid credentials.\n\nThe vulnerability stems from improper validation of LDAP authentication responses when anonymous binds are permitted, effectively treating anonymous bind success as valid user authentication. \n\nImpact\n\nA remote, unauthenticated attacker can:\n * Gain unauthorized access to the Apache Druid cluster\n * Access sensitive data stored in Druid datasources\n * Execute queries and potentially manipulate data\n * Access administrative interfaces if the bypassed account has elevated privileges\n * Completely compromise the confidentiality, integrity, and availability of the Druid deployment \n\n\nMitigation\n \nImmediate Mitigation (No Druid Upgrade Required): \n * Disable anonymous bind on your LDAP server. This prevents the vulnerability from being exploitable and is the recommended immediate action.\n\n\n\nResolution\n * Upgrade Apache Druid to version 36.0.0 or later, which includes fixes to properly reject anonymous LDAP bind attempts."
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"value": "Productos y Versiones Afectados\n * Apache Druid\n * Versiones Afectadas: 0.17.0 hasta 35.x (todas las versiones anteriores a 36.0.0)\n * Prerrequisitos:\n * extensión druid-basic-security habilitada\n * autenticador LDAP configurado\n * El servidor LDAP subyacente permite el enlace anónimo\n\nDescripción de la vulnerabilidad\n\nExiste una vulnerabilidad de omisión de autenticación en Apache Druid al usar la extensión druid-basic-security con autenticación LDAP. Si el servidor LDAP subyacente está configurado para permitir enlaces anónimos, un atacante puede omitir la autenticación proporcionando un nombre de usuario existente con una contraseña vacía. Esto permite el acceso no autorizado a recursos de Druid que de otro modo estarían restringidos sin credenciales válidas.\n\nLa vulnerabilidad se deriva de una validación incorrecta de las respuestas de autenticación LDAP cuando se permiten los enlaces anónimos, tratando efectivamente el éxito del enlace anónimo como una autenticación de usuario válida.\n\nImpacto\n\nUn atacante remoto no autenticado puede:\n * Obtener acceso no autorizado al clúster de Apache Druid\n * Acceder a datos sensibles almacenados en las fuentes de datos de Druid\n * Ejecutar consultas y potencialmente manipular datos\n * Acceder a interfaces administrativas si la cuenta omitida tiene privilegios elevados\n * Comprometer completamente la confidencialidad, integridad y disponibilidad de la implementación de Druid\n\nMitigación\n\nMitigación Inmediata (No se requiere actualización de Druid):\n * Deshabilite el enlace anónimo en su servidor LDAP. Esto evita que la vulnerabilidad sea explotable y es la acción inmediata recomendada.\n\nResolución\n * Actualice Apache Druid a la versión 36.0.0 o posterior, que incluye correcciones para rechazar correctamente los intentos de enlace anónimo de LDAP."
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"lastModified": "2026-06-17T10:22:17.367",
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