CVE-2026-109285CWE-863broken-access-control

CVE-2026-109285

Medium · published October 12, 2026

CVSS v3.1
5.0
EPSS
0%
Percentile
9.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
2.3 · 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
EPSS
0.00198 · 9.1th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-12T21:17Z
References (3)
https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997 · [email protected]https://www.vulncheck.com/advisories/open-webui-0.6.0-before-0.11.4-improper-access-control-via-stale-file-metadata · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-9cxp-636w-4997 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:04Z
    Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata
    cvelistv5
  • 12 OCT 16:04Z
    Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata
    cvelistv5