CVE-2026-45365
Open WebUI: Authenticated users can bypass model access control via exposed query parameter
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, an internal-only bypass_filter parameter is exposed on the /openai/chat/completions and /ollama/api/chat HTTP endpoints via FastAPI query string binding, allowing any authenticated user to append ?bypass_filter=true and bypass model access control checks to invoke admin-restricted models. This vulnerability is fixed in 0.8.11.
INFO
Published Date :
May 15, 2026, 10:16 p.m.
Last Modified :
Nov. 11, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-45365
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Open WebUI to version 0.8.11 or newer.
- Remove the bypass_filter parameter if present.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45365.
| URL | Resource |
|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m | Exploit Patch Vendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m | Exploit Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45365 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45365
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45365 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45365 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Nov. 11, 2026
Action Type Old Value New Value Added Translation Title: Open-webui, Description: Open WebUI es una plataforma de inteligencia artificial autoalojada diseñada para operar completamente sin conexión. Antes de la versión 0.8.11, un parámetro bypass_filter de uso interno está expuesto en los puntos finales HTTP /openai/chat/completions y /ollama/api/chat a través del enlace de cadena de consulta de FastAPI, permitiendo a cualquier usuario autenticado añadir ?bypass_filter=true y omitir las comprobaciones de control de acceso del modelo para invocar modelos restringidos para administradores. Esta vulnerabilidad está corregida en la versión 0.8.11. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'open-webui', 'product': 'open-webui', 'versions': [{'status': 'affected', 'version': '< 0.8.11'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45365', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-19T12:26:51.420869Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 19, 2026
Action Type Old Value New Value Added Reference https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m -
Initial Analysis by [email protected]
May. 19, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* versions up to (excluding) 0.8.11 Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m Types: Exploit, Patch, Vendor Advisory -
New CVE Received by [email protected]
May. 15, 2026
Action Type Old Value New Value Added Description Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, an internal-only bypass_filter parameter is exposed on the /openai/chat/completions and /ollama/api/chat HTTP endpoints via FastAPI query string binding, allowing any authenticated user to append ?bypass_filter=true and bypass model access control checks to invoke admin-restricted models. This vulnerability is fixed in 0.8.11. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Added CWE CWE-285 Added Reference https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m