EUVD-2026-75178

Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint...

CVE-2026-87994

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, the channel branch of chatcompletion in backend/openwebui/main.py checked channel write access and channel membership for a supplied messageid but did not verify that the calling user...

Eval Injection

Overview xinference is a powerful and versatile library designed to serve language, speech recognition, and multimodal models. With Xorbits Inference, you can effortlessly deploy and serve your or state-of-the-art built-in models using just a single command. Whether you are a researcher, develope...

CVE-2026-77776

Headroom's LLM proxy derives the memory owner from the x-headroom-user-id request header. The header is read directly at several points in headroom/proxy/handlers/openai.py, including the chat completion and websocket paths, and nothing binds the value to the caller. A client can therefore name...

CVE-2026-59714

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a...

CVE-2026-59714

CVE-2026-59714 describes a cross-channel message overwrite vulnerability in Open WebUI exposed by the chat-completions path. From v0.9.5 to before v0.10.0, an authenticated user could overwrite a message in a channel they do not belong to by using a channel: chat_id with a caller-supplied message...

CVE-2026-59714 Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a...

CVE-2026-59714 Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a...

PT-2026-76479

Summary An authenticated user whose features.image generation permission has been revoked can still make the server generate images by sending the feature flag in a chat-completion request. The chat pipeline took the client-supplied features object at face value and never re-checked the permissio...

PT-2026-76476

Summary Open WebUI lets a client define a model inline on a chat request instead of selecting a saved workspace model. The knowledge attached to such an inline model was used as-is, without checking that the caller can read what it points at. Any authenticated user who knows another user's file i...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization through the processchatpayload process. An attacker can bypass intended permission restrictions by supplying a crafted features object in a chat-completion request, allowing unauthoriz...

Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

SummaryAny authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a channel:-prefixed chatid and a target messageid. The channel: path routes pipeline output through makechannelemitte...

PYSEC-2026-3605 Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

Summary Any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a channel:-prefixed chatid and a target messageid. The channel: path routes pipeline output through...

PT-2026-67846

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.8.8 through 0.10.2 Description An issue exists where inline direct model metadata accepts client-supplied knowledge attachments without verifying the caller's read access. This occurs when a client defines a model inline...

PT-2026-67921

Summary An authenticated user whose features.image generation permission has been revoked can still make the server generate images by sending the feature flag in a chat-completion request. The chat pipeline took the client-supplied features object at face value and never re-checked the permissio...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the generatechatcompletion process. An attacker can gain unauthorized access to restricted underlying models by submitting crafted requests to task endpoints that leverage readable...

Open WebUI: Arena task endpoints can bypass underlying model access controls

Summary An authenticated non-admin user with read access to an arena wrapper model can reach a restricted underlying model through task endpoints such as /api/v1/tasks/moa/completions. The normal chat route resolves arena models before the final chat dispatch and therefore re-checks the selected...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization through the chat completion process. An attacker can overwrite messages in channels they do not belong to, including private and direct message channels, by supplying a crafted chatid an...

Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

Summary Any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a channel:-prefixed chatid and a target messageid. The channel: path routes pipeline output through...

GHSA-X2FF-V5V8-M75M Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)

Summary Any authenticated user can overwrite the content of a message in a channel they do not belong to including private and DM channels by sending a chat completion request with a channel:-prefixed chatid and a target messageid. The channel: path routes pipeline output through...