CVE-2026-88001

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

Published: Sep 9, 2026Updated: Sep 14, 2026 Sources: CVE List NVDCWE-918

5.0MEDIUM

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-918

Affected Products

open-webui

oss-projectaka open-webui/open-webui

open-webuiOn-premWeb App

AI / ML / ai-agent-tooling

openwebui

oss-projectaka open webui

open webuiOn-premWeb App

AI / ML / ai-agent-tooling

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Command and Control

Initial Access

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References

https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w

github.com

https://github.com/open-webui/open-webui/pull/27823

github.com

https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7

github.com

and 1 more references View all →

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