PT-2026-59362

Base Model Routing Bypasses Access Control via Model Chaining Affected Component Model chaining via base model id: - backend/open webui/routers/models.py lines 170-214, create new model - backend/open webui/routers/models.py lines 254-308, import models - backend/open webui/main.py lines 1696-171...

PT-2026-59336

Summary A Server-Side Request Forgery SSRF vulnerability exists in process picture url in backend/open webui/utils/oauth.py line 1338. The function fetches arbitrary URLs from OAuth picture claims without applying validate url, allowing an attacker to force the server to make HTTP requests to...

PT-2026-59339

As part of our research on improving our AI pentest, we have uncovered the following issue in Open WebUI. We've manually verified and tided up the report, but you can also find the original agent finding at the bottom of this report. Summary The channel webhook create/update flow accepts arbitrar...

PT-2026-59398

Stored XSS to Account Takeover via Model Profile Images in Open WebUI Affected: Open WebUI tags. On the output side, users.py added a MIME allowlist check and X-Content-Type-Options: nosniff. The fix was applied to UserUpdateForm, UpdateProfileForm, and later to ChannelWebhookForm. Three models...

PT-2026-59340

Summary The chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthoriz...

PT-2026-59345

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 chat completion API, the parameters tool ids and tool servers are supplied by the user. These...

PT-2026-59353

Summary Broken Access Control in Tool Valves Open WebUI supports function calling through "Tools". Function calling allows an LLM to reliably connect to external tools and interact with external APIs. Exemplary use-cases include connecting to an internal knowledge base, retrieving emails from an...

PT-2026-59350

Vulnerability Type: Information Disclosure / Missing Authentication Severity: Medium Component: backend/open webui/routers/retrieval.py — get status GET / Affected Endpoint: GET /api/v1/retrieval/ Affected Version: Open WebUI main branch — confirmed unpatched through v0.9.2 Authentication Require...

The vulnerability of the innerHTML component of the Open WebUI web interface allows a attacker to execute arbitrary JavaScript code.

The vulnerability of the innerHTML component in the Open WebUI-based web interface is related to the lack of measures taken to protect the structure of the web page. Exploiting this vulnerability allows a remote attacker to execute arbitrary JavaScript code...

The vulnerability of the sheet_to_html() function in the artificial intelligence-based web interface Open WebUI allows attackers to perform cross-site scripting attacks (XSS).

The vulnerability of the sheettohtml function in the Open WebUI artificial intelligence-based web interface exists due to the lack of measures taken to protect the structure of the web page. Exploiting this vulnerability allows a malicious actor to perform cross-site scripting attacks XSS remotel...

The vulnerability of the Open WebUI web interface, related to the lack of permission checking, allows a violator to gain read access, modify data, and increase their privileges.

The vulnerability of the Open WebUI web interface relates to the lack of permission checking for workspace.models.import. Exploiting this vulnerability can allow an attacker, operating remotely, to gain read access, modify data, and enhance their privileges by sending a specially crafted POST...

The vulnerability in the Open WebUI web interface relates to the disclosure of information in the erroneous data area, allowing an intruder to obtain unauthorized access to the protected information.

The vulnerability of the Open WebUI artificial intelligence-based web interface is related to the disclosure of information in the erroneous data area. Exploiting this vulnerability can allow an attacker, operating remotely, to gain unauthorized access to protected information...

The vulnerability of the get_sources_from_items() function in the Open WebUI artificial intelligence-based web interface allows a intruder to gain unauthorized access to protected information.

The vulnerability of the getsourcesfromitems function in the Open WebUI AI-based web interface is related to deficiencies in the authentication process. Exploiting this vulnerability could allow an attacker to gain unauthorized access to protected information through the Range Addressing RAG...

The vulnerability of the filter_allowed_access_grants() function in the Open WebUI artificial intelligence-based web interface, which allows a violator to increase their privileges

The vulnerability of the filterallowedaccessgrants function in the Open WebUI AI-based web interface is related to the lack of authorization during the processing of the final endpoint /api/v1/channels/id/members. Exploiting this vulnerability could allow a malicious actor to increase their...

The vulnerability of the _sanitize_proxy_path() function (backend/open_webui/routers/terminals.py) in the Open WebUI AI-based web interface allows a attacker to compromise the confidentiality of protected information.

The vulnerability of the sanitizeproxypath function backend/openwebui/routers/terminals.py in the Open WebUI AI-based web interface is related to an incorrect restriction on the path name of the restricted directory. Exploiting this vulnerability could allow a malicious actor to compromise the...

PT-2026-59347

CONFIDENTIAL Vulnerability Disclosure Analysis Documentation --- Vulnerability Details | | Field | Value | |---|-------|-------| | 1 | Discoverer | Taylor Pennington of KoreLogic, Inc. | | 2 | Date Submitted | June 11, 2024 | | 3 | Title | Open WebUI Improper Authorization Control | | 5 | Affecte...

PT-2026-59369

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...

The vulnerability of the is_user_channelmember() function in the Open WebUI artificial intelligence-based web interface allows a intruder to bypass existing security mechanisms and gain access to read and modify data.

The vulnerability of the isuserchannelmember function in the Open WebUI artificial intelligence-based web interface is related to the lack of restrictions on access to API keys. Exploiting this vulnerability could allow a malicious actor to bypass existing security mechanisms and gain access to...

EUVD-2026-42726

Hermes WebUI before 0.51.307 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to circumvent local-origin IP restrictions on onboarding endpoints by supplying a spoofed X-Forwarded-For header with a loopback address. Attackers can exploit this bypass to...

The vulnerability in the Open WebUI web interface, related to the unlimited loading of dangerous types of files, allows attackers to bypass existing security mechanisms and load any files they desire.

The vulnerability of the Open WebUI web interface is related to the unlimited loading of dangerous files. Exploiting this vulnerability allows a malicious actor to bypass existing security mechanisms and load any desired files...