CVE-2026-88001 PUBLISHED

Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redirect targets

Assigner: GitHub_M
Reserved: 09.09.2026 Published: 09.09.2026 Updated: 09.09.2026

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, server-side web fetches did not reapply WEB_FETCH_FILTER_LIST or private-address controls to HTTP redirect destinations when AIOHTTP_CLIENT_ALLOW_REDIRECTS was enabled. An authenticated user could redirect the aiohttp and requests fetch paths to excluded hosts, loopback, private networks, or cloud metadata services and route resulting content into web search, URL ingestion, page-fetch tools, or chat image processing. This issue is fixed in version 0.11.1.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS Score: 5

Product Status

Vendor open-webui
Product open-webui
Versions
  • Version >= 0.9.5, < 0.11.1 is affected

References

Problem Types

  • CWE-918: Server-Side Request Forgery (SSRF) CWE