CVE-2026-45350— Open WebUI: Chat completion API allows tool restrictions to be bypassed
Possible ATT&CK Techniques 3AI
T1190 · Exploit Public-Facing Application T1078 · Valid Accounts T1528 · Steal Application Access TokenAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| open-webui | open-webui | < 0.8.6 | affected |
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I. Basic Information for CVE-2026-45350
Vulnerability Information
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Vulnerability Title
Open WebUI: Chat completion API allows tool restrictions to be bypassed
Source: NVD (National Vulnerability Database)
Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.6, there is a vulnerability in chat completion API, which allows attackers to bypass tool restrictions, potentially enabling unauthorized actions or access. In the chat_completion API, the parameters tool_ids and tool_servers are supplied by the user. These parameters are used to create a tools_dict by the middleware. This is then used by get_tool_by_id to retrieve the appropriate tool. However, there is no checks in that ensures the user that uses the API has permission to use the tool, meaning that a user can invoke any server tool by supplying the correct tool_id or tool_servers parameters via the chat completion API. Moreover, the authentication token stored in the server would be used when invoking the tool, so the tool will be invoked with the server privilege. This vulnerability is fixed in 0.8.6.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-webui | open-webui | < 0.8.6 | - |
II. Public POCs for CVE-2026-45350
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · open-webui · 2026-05-15 · 59 CVEs total
| CVE-2026-44551 | 9.1 CRITICAL | Open WebUI: LDAP Empty Password Authentication Bypass |
| CVE-2026-45672 | 8.8 HIGH | Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature g |
| CVE-2026-44552 | 8.7 HIGH | Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Ena |
| CVE-2026-45315 | 8.7 HIGH | Open WebUI: Stored XSS via attacker-controlled file extension in /api/v1/audio/transcripti |
| CVE-2026-45331 | 8.5 HIGH | Open WebUI: Full SSRF Vulnerability in the RAG Web Search Feature |
| CVE-2026-45400 | 8.5 HIGH | Open WebUI: Server-Side Request Forgery (SSRF) bypass in `validate_url` |
| CVE-2026-45401 | 8.5 HIGH | Open WebUI: SSRF Bypass via HTTP Redirect Following in Web-Fetch and Image-Load Endpoints |
| CVE-2026-44570 | 8.3 HIGH | Open WebUI: Inconsistent authorization controls within memories API |
| CVE-2026-45665 | 8.1 HIGH | Open WebUI: Stored XSS in Banner Component via Improper Sanitization Order |
| CVE-2026-44553 | 8.1 HIGH | Open WebUI: Stale Admin Role in Socket.IO Session Pool Enables Post-Demotion Cross-User No |
| CVE-2026-44565 | 8.1 HIGH | Open WebUI: Open WebUI Arbitrary File Write, Delete via Path Traversal |
| CVE-2026-45675 | 8.1 HIGH | Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts |
| CVE-2026-45402 | 8.1 HIGH | Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge |
| CVE-2026-44554 | 8.1 HIGH | Open WebUI: Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overw |
| CVE-2026-45301 | 8.1 HIGH | Open WebUI: Missing permission check in files API allows authenticated users to list, acce |
| CVE-2026-45671 | 8.0 HIGH | Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion |
| CVE-2026-45338 | 7.7 HIGH | Open WebUI: SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py) |
| CVE-2026-45303 | 7.7 HIGH | Open WebUI: Stored XSS via the HTML renedering view |
| CVE-2026-44555 | 7.6 HIGH | Open WebUI: Base Model Routing Bypasses Access Control via Model Chaining |
| CVE-2026-45398 | 7.5 HIGH | Open WebUI: IDOR - Retrieval API Bypasses Knowledge Base Access Controls |
Showing top 20 of 59 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: open-webui
- CVE-2026-45338
Open WebUI: SSRF via OAuth Profile Picture URL in _process_p - CVE-2026-44549
Open WebUI: Stored XSS in excel file preview - CVE-2026-45299
Open WebUI: Stored Cross-Site Scripting In Profile Picture - CVE-2026-45665
Open WebUI: Stored XSS in Banner Component via Improper Sani - CVE-2026-45667
Open WebUI: Unauthenticated endpoint can trigger embedding g
Same vendor: open-webui
- CVE-2026-45338
Open WebUI: SSRF via OAuth Profile Picture URL in _process_p - CVE-2026-44549
Open WebUI: Stored XSS in excel file preview - CVE-2026-45299
Open WebUI: Stored Cross-Site Scripting In Profile Picture - CVE-2026-45665
Open WebUI: Stored XSS in Banner Component via Improper Sani - CVE-2026-45667
Open WebUI: Unauthenticated endpoint can trigger embedding g
Same weakness: CWE-862
- CVE-2026-8681
Essential Chat Support <= 1.0.1 - Missing Authorization to U - CVE-2026-45667
Open WebUI: Unauthenticated endpoint can trigger embedding g - CVE-2026-44571
Open WebUI: Improper Authorization in Standard Channels Allo - CVE-2026-44569
Open WebUI: Insecure Message Access Breaks Authorization - CVE-2026-44550
Open WebUI: Mass Assignment via Pydantic extra='allow' Allow
V. Comments for CVE-2026-45350
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