{"id":"CVE-2026-109285","title":"Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in has_access_to_file that lets former knowledge base collaborators keep file access via stale cached knowledge base references","summary":"Open WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in has_access_to_file that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or…","severity":"medium","cvss":5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-863"],"published":"2026-10-12","updated":"2026-10-12","sourceUpdated":"2026-10-12T17:17:21.463","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109285","references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/open-webui-0.6.0-before-0.11.4-improper-access-control-via-stale-file-metadata","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-12T18:00:08.188Z","slug":"CVE-2026-109285","body":"## Overview\n\nOpen WebUI from 0.6.0 before 0.11.4 contains an improper access control vulnerability in has_access_to_file that lets former knowledge base collaborators keep file access via stale cached knowledge base references. Attackers with read or write grants can download removed files through the file content endpoint or delete them, including from the owner's private knowledge bases.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}