CVE-2026-5922: Improper Neutralization of Input During Web Page Generation

The IP phone might use malicious input stored in configuration parameters and render it as content for the WebUI’s webpage...

Open WebUI has Blind Server Side Request Forgery in its Image Edit Functionality

Summary There is a blind server side request forgery in the functionality that allows editing an image via a prompt. The affected function will perform a GET request on the URL provided by the user. There is no restriction on the domain of the provided URL allowing the local address space to be...

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 loadurlimage function, which performs a GET request on user-supplied URLs without restricting the domain. An attacker can access internal network resources and perform...

EUVD-2026-22188

Open WebUI has Blind Server Side Request Forgery in its Image Edit Functionality...

Open WebUI vulnerable to Stored XSS via iFrame embeds in response messages

Summary Manually modifying chat history allows setting the embeds property on a response message, the content of which is loaded into an iFrame with a sandbox that has allow-scripts and allow-same-origin set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS o...

EUVD-2026-7981

Open WebUI vulnerable to Stored XSS via iFrame embeds in response messages...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS in the CitationModal process. An attacker can execute arbitrary JavaScript in the context of another user's session by crafting a malicious document payload and manipulating the html...

GHSA-XC8P-9RR6-97R2 Open WebUI vulnerable to Stored XSS via iFrame in citations model

Summary Manually modifying chat history allows setting the html property within document metadata. This causes the frontend to enter a code path that treats document contents as HTML, and render them in an iFrame when the citation is previewed. This allows stored XSS via a weaponised document...

GHSA-9F4F-JV96-8766 Open WebUI vulnerable to stored XSS via unescaped markdown token in MarkdownTokens.svelte leading to full account takeover and RCE via functions

Summary A vulnerability in the way certain html tags in chat messages are rendered allows attackers to inject JavaScript code into a chat transcript. The JavaScript code will be executed in the user's browser every time that chat transcript is opened, allowing attackers to retrieve the user's...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS in the rendering of chat messages containing certain HTML tags using the @html functionality in Svelte. An attacker can execute arbitrary JavaScript in the context of a user's browser...

EUVD-2025-13498

Open WebUI vulnerable to stored XSS via unescaped markdown token in MarkdownTokens.svelte leading to full account takeover and RCE via functions...

PYSEC-2026-1726 Open WebUI vulnerable to Server-Side Request Forgery (SSRF) via Arbitrary URL Processing in /api/v1/retrieval/process/web

Summary A Server-Side Request Forgery SSRF vulnerability in Open WebUI allows any authenticated user to force the server to make HTTP requests to arbitrary URLs. This can be exploited to access cloud metadata endpoints AWS/GCP/Azure, scan internal networks, access internal services behind...

Open WebUI vulnerable to Server-Side Request Forgery (SSRF) via Arbitrary URL Processing in /api/v1/retrieval/process/web

SummaryA Server-Side Request Forgery SSRF vulnerability in Open WebUI allows any authenticated user to force the server to make HTTP requests to arbitrary URLs. This can be exploited to access cloud metadata endpoints AWS/GCP/Azure, scan internal networks, access internal services behind firewall...

open-webui is Vulnerable to Incorrect Access Control

open-webui v0.6.33 is vulnerable to Incorrect Access Control. The API /api/tasks/stop/ directly accesses and cancels tasks without verifying user ownership, enabling attackers a normal user to stop arbitrary LLM response tasks...

PYSEC-2026-1732 open-webui is Vulnerable to Incorrect Access Control

open-webui v0.6.33 is vulnerable to Incorrect Access Control. The API /api/tasks/stop/ directly accesses and cancels tasks without verifying user ownership, enabling attackers a normal user to stop arbitrary LLM response tasks...

PYSEC-2026-1729 Open WebUI Affected by an External Model Server (Direct Connections) Code Injection via SSE Events

Summary Open WebUI v0.6.33 and below contains a code injection vulnerability in the Direct Connections feature that allows malicious external model servers to execute arbitrary JavaScript in victim browsers via Server-Sent Event SSE execute events. This leads to authentication token theft, comple...

Open WebUI Affected by an External Model Server (Direct Connections) Code Injection via SSE Events

SummaryOpen WebUI v0.6.33 and below contains a code injection vulnerability in the Direct Connections feature that allows malicious external model servers to execute arbitrary JavaScript in victim browsers via Server-Sent Event SSE execute events. This leads to authentication token theft, complet...

PYSEC-2026-1741 Open WebUI vulnerable to Stored DOM XSS via prompts when 'Insert Prompt as Rich Text' is enabled resulting in ATO/RCE

Summary The functionality that inserts custom prompts into the chat window is vulnerable to DOM XSS when 'Insert Prompt as Rich Text' is enabled, since the prompt body is assigned to the DOM sink .innerHtml without sanitisation. Any user with permissions to create prompts can abuse this to plant ...

SUSE CVE-2026-11322

Hermes WebUI prior to v0.51.221 contains a path traversal vulnerability that allows attackers to escape the workspace boundary by supplying symlinks that resolve to files or directories outside the designated workspace root. Attackers can exploit the workspace file and listing APIs, which resolve...

Open WebUI lacks authentication for the `api/v1/utils/pdf` endpoint

In version v0.3.10 of open-webui/open-webui, the api/v1/utils/pdf endpoint lacks authentication mechanisms, allowing unauthenticated attackers to access the PDF generation service. This vulnerability can be exploited by sending a POST request with an excessively large payload, potentially leading...