CVE-2026-54010CWE-284CWE-639CWE-862

Open WebUI: Forged chat-file link allows cross-user file read and deletion

High · published June 23, 2026

CVSS v3.1
8.3
EPSS
0%
Percentile
35.2
In the wild
Unconfirmed
What it is

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI lets an authenticated user attach arbitrary file_id values to their own chat message without checking whether they own or can read those files. If the attacker then shares that chat and grants themselves read access, has_access_to_file() treats the victim file as accessible through the shared chat, and the file endpoints read or delete the victim file. This vulnerability is fixed in 0.9.6.

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00420 · 35.2th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-639 · Authorization Bypass Through User-Controlled Key; CWE-862 · Missing Authorization
Published
2026-06-23T16:48Z
EPSS history
Timeline
  • 23 JUN 16:48Z
    Open WebUI: Forged chat-file link allows cross-user file read and deletion
    cvelistv5