Improper Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Improper Authorization via the bypassfilter parameter in the HTTP query string, which is unintentionally exposed in the route handler. An attacker can gain unauthorized access to restricted models by appendin...

Information Exposure

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Information Exposure via the api/models endpoint. An attacker can access sensitive system prompt information by sending authenticated requests as a non-admin user. Remediation Upgrade open-webui to version...

GHSA-JH9G-8JQW-M2QX Open WebUI Exposes System Prompt to Regular User [Non-Admin]

Summary A regular user non-admin can view the system prompt of the model which is set by an admin. Details When a regular user non-admin logs into the application, a http://IP:8080/api/models? web request is initiated by the application and in response, it reveals the system prompt of available...

hubzoid (>=0.2.2 <=0.6.0), openwebui-token-tracking (>=0.1.7 <=0.1.10) +1 more potentially affected by CVE-2026-45351 via open-webui (>=0.6.0 <=0.8.8)

open-webui PYPI version =0.6.0, =0.2.2, =0.1.7, =0.1.0, =0.1.5 Source cves: CVE-2026-45351 Source advisory: OSV:GHSA-JH9G-8JQW-M2QX...

GHSA-4PCG-253R-RF9W Open WebUI's chat completion API allows tool restrictions to be bypassed

Summary Open WebUI v0.6.43 contains a vulnerability in its chat completion API, which allows attackers to bypass tool restrictions, potentially enabling unauthorized actions or access. Details In the chatcompletion API, the parameters toolids and toolservers are supplied by the user. These...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization via the chatcompletion API when user-supplied toolids or toolservers parameters are processed without verifying the user's permissions. An attacker can gain unauthorized access to...

GHSA-GFM2-XM6C-37QC Open WebUI has Broken Access Control for Completions API

Summary Any user X can continue the conversation of any other user Y, as long as the Chat ID of Y is known. User X does not even need to be an admin to do so. Details A user just needs to use the API endpoint: /api/chat/completions with their own API key generated in OWUI and the Chat ID of anoth...

Open WebUI has Broken Access Control for Completions API

Summary Any user X can continue the conversation of any other user Y, as long as the Chat ID of Y is known. User X does not even need to be an admin to do so. Details A user just needs to use the API endpoint: /api/chat/completions with their own API key generated in OWUI and the Chat ID of anoth...

Authorization Bypass Through User-Controlled Key

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key through the chatcompletion process. An attacker can access and continue another user's conversation by supplying a known Chat ID in API requests. This is only...

Open WebUI vulnerable to blind server side request forgery (SSRF) via the PDF generate function

Summary Blind server side request forgery SSRF via the PDF generate function. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here. Tested on Ope...

GHSA-F776-FP4W-266C Open WebUI vulnerable to blind server side request forgery (SSRF) via the PDF generate function

Summary Blind server side request forgery SSRF via the PDF generate function. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here. Tested on Ope...

Server-side Request Forgery (SSRF)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the pdf generate process. An attacker can cause the server to initiate arbitrary outbound HTTP requests by injecting crafted HTML, such as an tag, into user-controllable...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS through the @html svg rendering path in the SVGPanZoom.svelte common component. An attacker can execute an arbitrary script in the browser by supplying a crafted SVG payload that is...

Open WebUI Has Stored Cross-Site Scripting in SVG Renderer

Summary There is a Cross-Site Scripting vulnerability in Open WebUI SVG renderer implementation. Details It is possible permanently save any HTML/JavaScript code in the application, which can be then executed in the context of the application domain. This behaviour can be used to extract and stea...

GHSA-R29H-37FJ-X2W6 Open WebUI Has Stored Cross-Site Scripting in SVG Renderer

Summary There is a Cross-Site Scripting vulnerability in Open WebUI SVG renderer implementation. Details It is possible permanently save any HTML/JavaScript code in the application, which can be then executed in the context of the application domain. This behaviour can be used to extract and stea...

Open WebUI missing authorization check at the model update function - models from other users can be updated

Summary A user can modify another user's model even if its visibility is set to Private. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here...

Improper Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Improper Authorization in the model update process. An attacker can modify resources belonging to other users by sending crafted requests that bypass intended access controls. Remediation Upgrade open-webui t...

GHSA-GM54-M39W-GRJP Open WebUI missing authorization check at the model update function - models from other users can be updated

Summary A user can modify another user's model even if its visibility is set to Private. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization in the authentication process when API keys are supplied via the x-api-key header instead of the Authorization header. An attacker can gain unauthorized access to restricted API...

GHSA-57Q6-FVP4-PQMM Open WebUI's API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints

Summary Open WebUI allows admins to restrict which API endpoints an API key can access. When an API key is restricted from /api/v1/messages, requests using the Authorization: Bearer sk-... header are correctly blocked with 403. However, the same key sent via the x-api-key header bypasses the...