Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109285Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata

Medium 5.0

In plain English

A medium-severity incorrect authorization in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.2%top 84.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	0.6.0 – before 0.11.4

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

References

GitHub Security Advisory (GHSA-9cxp-636w-4997) vendor-advisory
VulnCheck Advisory: Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata third-party-advisory