PYSEC-2026-2692 Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion

Summary Any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting...

PYSEC-2026-2758 Open WebUI: Authenticated users can bypass model access control via exposed query parameter [AI-ASSISTED]

Summary An internal-only bypassfilter 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 ?bypassfilter=true and bypass model access control checks to invoke admin-restricted models...

PYSEC-2026-2727 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...

PYSEC-2026-2726 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...

PYSEC-2026-2739 Open WebUI's Improper Authorization in Standard Channels Allows Message Updates with Read Permission

Vulnerability Description In standard channels i.e., channels whose channel.type is neither group nor dm, the endpoint POST /api/v1/channels/channelid/messages/messageid/update can be accessed with read permission only. When accesscontrol is set to None, the authorization check hasaccess...,...

PYSEC-2026-2754 Open WebUI's Ollama Model Access Control Bypass via /api/generate, /api/embed, /api/embeddings, and /api/show

Ollama Model Access Control Bypass via /api/generate, /api/embed, /api/embeddings, and /api/show Affected Component Ollama proxy endpoints missing model access control: - backend/openwebui/routers/ollama.py lines 955-995, generatecompletion - backend/openwebui/routers/ollama.py lines 835-881, emb...

PYSEC-2026-2720 Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels

Missing Access Check on Channel Members Endpoint for Standard Channels Affected Component Channel members listing endpoint: - backend/openwebui/routers/channels.py lines 445-507, getchannelmembersbyid Affected Versions Current main branch and likely all versions with the channels feature...

PYSEC-2026-2734 Open WebUI's responses passthrough endpoint lacks access control authorization

Summary The /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While the primary chat completion endpoint generatechatcompletion checks model ownership, group membership, and...

Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining

Base Model Routing Bypasses Access Control via Model Chaining Affected ComponentModel chaining via basemodelid:- backend/openwebui/routers/models.py lines 170-214, createnewmodel- backend/openwebui/routers/models.py lines 254-308, importmodels- backend/openwebui/main.py lines 1696-1711, base mode...

PYSEC-2026-2719 Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining

Base Model Routing Bypasses Access Control via Model Chaining Affected Component Model chaining via basemodelid: - backend/openwebui/routers/models.py lines 170-214, createnewmodel - backend/openwebui/routers/models.py lines 254-308, importmodels - backend/openwebui/main.py lines 1696-1711, base...

PYSEC-2026-2648 MindsDB has an Improper Access Control Issue

A weakness has been identified in MindsDB up to 26.01. This impacts the function exec of the file mindsdb/integrations/handlers/byomhandler/procwrapper.py of the component Engine Handler. Executing a manipulation can lead to unrestricted upload. The attack can be executed remotely. The exploit ha...

OpenStack Ironic is Vulnerable to Inclusion of Functionality from Untrusted Control Sphere

OpenStack Ironic before 35.0.1 allows ipmitool execution in a non-default configuration that has a console interface...

PYSEC-2026-2525 OpenStack Ironic is Vulnerable to Inclusion of Functionality from Untrusted Control Sphere

OpenStack Ironic before 35.0.1 allows ipmitool execution in a non-default configuration that has a console interface...

PYSEC-2026-2876 pip Vulnerable to Inclusion of Functionality from Untrusted Control Sphere

pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python modules names. These module imports were intentionally deferred to increase startup time of the pip CLI. The patch changes self-update functionality to run...

Always-Incorrect Control Flow Implementation

Overview fschat is an An open platform for training, serving, and evaluating large language model based chatbots. Affected versions of this package are vulnerable to Always-Incorrect Control Flow Implementation via the function addtext of the component Arena Side-by-Side View Handler. The...

PYSEC-2026-2709 Open WebUI has Broken Access Control in Tool Valves

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...

PYSEC-2026-2693 Open WebUI has unauthorized deletion of knowledge files

Summary An access control check is missing when deleting a file from a knowledge base. The only check being done is that the user has write access to the knowledge base or is admin, but NOT that the file actually belongs to this knowledge base. It is thus possible to delete arbitrary files from...

PYSEC-2026-2451 django-unicorn affected by component state manipulation via unvalidated attribute access

Summary Component state manipulation is possible in django-unicorn due to missing access control checks during property updates and method calls. An attacker can bypass the intended ispublic protection to modify internal attributes such as templatename or trigger protected methods. Vulnerability...

PYSEC-2026-2326 Access control vulnerable to user data deletion by anonynmous users

Impact Anonymous users can delete the user data maintained by an AccessControl.userfolder.UserFolder which may prevent any privileged access. Patches The problem is fixed in version 7.2. Workarounds The problem can be fixed by adding dataroles = to AccessControl.userfolder.UserFolder. References...

PYSEC-2026-2325 Information disclosure in AccessControl

Impact Python's "format" functionality allows someone controlling the format string to "read" objects accessible recursively via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown getattr and getitem, not the policy...