CVE-2026-87999

Open WebUI: Any authenticated user can reach the Azure platform channel via server-side web fetch

Published: Sep 9, 2026Updated: Sep 16, 2026 Sources: CVE List NVDCWE-918

7.1HIGH

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Python's globally routable address classification as proof that a destination was external. An authenticated user could make an Azure-hosted instance fetch and return content from 168.63.129.16, the Azure platform channel, as well as other reserved ranges that the standard classification did not reject. This issue is fixed in version 0.11.1.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-918

Affected Products

openwebui

oss-projectaka open webui

open webuiOn-premWeb App

AI / ML / ai-agent-tooling

open-webui

oss-projectaka open-webui/open-webui

open-webuiOn-premWeb App

AI / ML / ai-agent-tooling

Exploitability

Official Patch Available

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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/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7

github.com

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

github.com

https://github.com/open-webui/open-webui/releases/tag/v0.11.1

github.com

and 1 more references View all →

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