CVE-2026-70479
Received Received - Intake

Open WebUI Playwright Web Loader Internal Address Access

Publication date: 2026-08-04

Last updated on: 2026-08-04

Assigner: GitHub, Inc.

Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEB_LOADER_ENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated user can use JavaScript to reach blocked internal addresses, and returned DOM can include data read from those addresses in web-search or RAG output. This issue is fixed in 0.11.0.

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Meta Information

Published
2026-08-04
Last Modified
2026-08-04
Generated
2026-08-05
AI Q&A
2026-08-04
EPSS Evaluated
N/A
NVD
CVE-2026-70479
EUVD
EUVD-2026-52915

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
open_webui open_webui 0.11.0
open_webui open_webui to 0.11.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Attack-Flow Graph

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Executive Summary

CVE-2026-70479 is a Server-Side Request Forgery (SSRF) vulnerability in Open WebUI versions 0.9.6 to 0.11.0 when the Playwright web loader is enabled. The issue occurs because Open WebUI only validates the top-level URL submitted by users but fails to validate subsequent sub-resource requests made by the loaded page in the browser. This allows authenticated users to bypass address restrictions and access internal services reachable by the browser, such as cloud metadata or private APIs.

Detection Guidance

Check Open WebUI version with: pip show open-webui. If version is between 0.9.6 and 0.11.0 and WEB_LOADER_ENGINE=playwright is enabled, the system is vulnerable. Review network logs for unexpected internal address access attempts from Open WebUI processes.

Impact Analysis

An authenticated attacker could exploit this vulnerability to access internal services, exposing sensitive HTTP responses through web-search or document-ingestion results. This could lead to unauthorized data exposure, including internal API responses or cloud metadata. Additionally, the vulnerability may degrade system performance due to unclosed browser sessions during batch processing.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating GDPR's data protection principles or HIPAA's requirements for safeguarding protected health information. Unauthorized exposure of internal services or metadata may result in compliance breaches, fines, or reputational damage.

Mitigation Strategies

Upgrade Open WebUI to version 0.11.0 or later. Disable WEB_LOADER_ENGINE=playwright if not required. Restrict network access for Open WebUI containers to prevent SSRF attacks. Monitor for unusual internal network traffic from Open WebUI processes.

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