Open WebUI's Improper Authorization in Standard Channels Allows Message Updates with Read Permission

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

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 ComponentOllama proxy endpoints missing model access control:- backend/openwebui/routers/ollama.py lines 955-995, generatecompletion- backend/openwebui/routers/ollama.py lines 835-881, embed-...

Open WebUI Vulnerable to Arbitrary File Upload and Path Traversal

CONFIDENTIAL KL-CAN-2024-002 Vulnerability Details| | Field | Value ||---|-------|-------|| 1 | Discoverer | Jaggar Henry & Sean Segreti of KoreLogic, Inc. || 2 | Date Submitted | 2024.03.12 || 3 | Title | Open WebUI Arbitrary File Upload + Path Traversal || 5 | Affected Vendor | Open WebUI || 6 ...

Open WebUI has Unauthorized File and Knowledge Base Content Access via RAG Vector Search

Unauthorized File and Knowledge Base Content Access via RAG Vector Search Affected ComponentRAG source resolution in chat completion pipeline:- backend/openwebui/retrieval/utils.py lines 963-965, 1063-1068, 1126-1131 in getsourcesfromitems Affected VersionsCurrent main branch commit 6fdd19bf1 and...

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-2026-2710 Open WebUI has Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overwrite

Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overwrite Affected Component Retrieval web/YouTube processing endpoints: - backend/openwebui/routers/retrieval.py lines 1810-1837, processweb - backend/openwebui/routers/retrieval.py the parallel processyoutube endpoint -...

PYSEC-2026-2707 Open WebUI vulnerable to Global Knowledge Base Enumeration via knowledge-bases Meta-Collection

Global Knowledge Base Enumeration via knowledge-bases Meta-Collection Affected Component Retrieval collection access validation: - backend/openwebui/routers/retrieval.py lines 2330-2355, validatecollectionaccess - backend/openwebui/routers/retrieval.py query endpoints, e.g. POST /query/doc Affect...

Open WebUI has Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overwrite

Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overwrite Affected ComponentRetrieval web/YouTube processing endpoints:- backend/openwebui/routers/retrieval.py lines 1810-1837, processweb- backend/openwebui/routers/retrieval.py the parallel processyoutube endpoint-...

Open WebUI has Improper Authorization Control

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 | Affected Vendo...

PYSEC-2026-2717 Open WebUI Vulnerable to Arbitrary File Upload and Path Traversal

CONFIDENTIAL KL-CAN-2024-002 Vulnerability Details | | Field | Value | |---|-------|-------| | 1 | Discoverer | Jaggar Henry & Sean Segreti of KoreLogic, Inc. | | 2 | Date Submitted | 2024.03.12 | | 3 | Title | Open WebUI Arbitrary File Upload + Path Traversal | | 5 | Affected Vendor | Open WebUI...

Open WebUI's Model Import Overwrites Any Model Without Ownership Check

Model Import Overwrites Any Model Without Ownership Check Affected ComponentModel import endpoint:- backend/openwebui/routers/models.py lines 254-308, importmodels Affected VersionsCurrent main branch commit 6fdd19bf1 and likely all versions with model import functionality. DescriptionThe POST...

PYSEC-2026-2703 Open WebUI has Improper Authorization Control

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...

Open WebUI: Deactivated Channel Members Retain Full Access to Group/DM Channels

Deactivated Channel Members Retain Full Access to Group/DM Channels Affected ComponentChannel membership authorization check:- backend/openwebui/models/channels.py lines 663-673, isuserchannelmember- Used at 15 locations in backend/openwebui/routers/channels.py Affected VersionsCurrent main branc...

Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels

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

PYSEC-2026-2749 Open WebUI's Model Import Overwrites Any Model Without Ownership Check

Model Import Overwrites Any Model Without Ownership Check Affected Component Model import endpoint: - backend/openwebui/routers/models.py lines 254-308, importmodels Affected Versions Current main branch commit 6fdd19bf1 and likely all versions with model import functionality. Description The POS...

Open WebUI vulnerable to Global Knowledge Base Enumeration via knowledge-bases Meta-Collection

Global Knowledge Base Enumeration via knowledge-bases Meta-Collection Affected ComponentRetrieval collection access validation:- backend/openwebui/routers/retrieval.py lines 2330-2355, validatecollectionaccess- backend/openwebui/routers/retrieval.py query endpoints, e.g. POST /query/doc Affected...

PYSEC-2026-2729 Open WebUI has Unauthorized File and Knowledge Base Content Access via RAG Vector Search

Unauthorized File and Knowledge Base Content Access via RAG Vector Search Affected Component RAG source resolution in chat completion pipeline: - backend/openwebui/retrieval/utils.py lines 963-965, 1063-1068, 1126-1131 in getsourcesfromitems Affected Versions Current main branch commit 6fdd19bf1...

Read-Only Open WebUI Users Can Modify Collaborative Documents via Socket.IO

Read-Only Users Can Modify Collaborative Documents via Socket.IO Affected ComponentSocket.IO collaborative document editing handler:- backend/openwebui/socket/main.py lines 667-721, ydoc:document:update handler Affected VersionsCurrent main branch and likely all versions with collaborative note...

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-2026-2762 Read-Only Open WebUI Users Can Modify Collaborative Documents via Socket.IO

Read-Only Users Can Modify Collaborative Documents via Socket.IO Affected Component Socket.IO collaborative document editing handler: - backend/openwebui/socket/main.py lines 667-721, ydoc:document:update handler Affected Versions Current main branch and likely all versions with collaborative not...