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Vulnerability record · CVE-2026-109285 · published 12 October 2026

CVE-2026-109285: Incorrect authorization vulnerability

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 write grants can download removed files through the file content endpoint or delete them, including from the owner's private knowledge bases.

2.3 CVSS 4.0 Low EPSS 0.20% · top 91.1% CWE-863 · Incorrect authorization Awaiting Analysis
2.3CVSS 4.0 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
15 Oct 2026Last modified by NVD

Description

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 write grants can download removed files through the file content endpoint or delete them, including from the owner's private knowledge bases.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997
https://www.vulncheck.com/advisories/open-webui-0.6.0-before-0.11.4-improper-access-control-via-stale-file-metadata
https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997

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Source: NIST National Vulnerability Database (record CVE-2026-109285), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.