CVE-2026-109285

Published: Oct 12, 2026Modified: Oct 15, 2026

2.3

Vector

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:X/V:X/RE:X/U:X

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:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

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.

Related CWEs

CWE-863

Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

References (3)

https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/open-webui-0.6.0-before-0.11.4-improper-access-control-via-stale-file-metadata

Source: disclosure@vulncheck.com

https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.