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CVE-2026-29070

Estado: AnalizadaAlta (8.1)—

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an access control check is missing when deleting a file from a knowledge base. The only check being done is that the user has write access to the knowledge base (or is admin), but NOT that the file actually belongs to this knowledge base. It is thus possible to delete arbitrary files from arbitrary knowledge bases (as long as one knows the file id). Version 0.8.6 patches the issue.

CVSS

Probabilidad de explotación (EPSS)

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.

Acceso remoto autenticado (PR:L) a servicio de red sin interacción. Impacto: eliminación no autorizada de archivos de conocimiento (manipulación de datos) e interferencia en disponibilidad de información.

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

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationEncrypt Sensitive InformationDisable or Remove Feature or Program

Tecnologías afectadas (1)

Openwebui — Open Webui

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-29070",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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            },
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              "automatable": "no"
            },
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          ],
          "version": "2.0.3",
          "timestamp": "2026-03-30T11:49:47.852848Z"
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          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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  "published": "2026-03-27T00:16:22.823",
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  "weaknesses": [
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      "description": [
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          "value": "CWE-862"
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      "value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an access control check is missing when deleting a file from a knowledge base. The only check being done is that the user has write access to the knowledge base (or is admin), but NOT that the file actually belongs to this knowledge base. It is thus possible to delete arbitrary files from arbitrary knowledge bases (as long as one knows the file id). Version 0.8.6 patches the issue."
    },
    {
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      "value": "Open WebUI es una plataforma de inteligencia artificial autoalojada diseñada para operar completamente sin conexión. Antes de la versión 0.8.6, falta una verificación de control de acceso al eliminar un archivo de una base de conocimiento. La única verificación que se realiza es que el usuario tenga acceso de escritura a la base de conocimiento (o sea administrador), pero NO que el archivo realmente pertenezca a esta base de conocimiento. Por lo tanto, es posible eliminar archivos arbitrarios de bases de conocimiento arbitrarias (siempre que se conozca el ID del archivo). La versión 0.8.6 corrige el problema."
    }
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  "lastModified": "2026-06-17T10:29:32.877",
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