---
id: CVE-2026-87999
title: >-
  Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI
  platform
summary: >-
  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 …
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-918
vendor: openwebui
product: open_webui
affected:
  - open_webui < 0.11.1
patched:
  - open_webui 0.11.1
published: '2026-09-09'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:13:49.077'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87999'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/pull/27823'
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/releases/tag/v0.11.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-34r3-9m95-vq73
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-34r3-9m95-vq73
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0036
epssPercentile: 0.27109
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T15:35:46.966072Z'
ingestedAt: '2026-09-11T10:30:26.776Z'
---

## Overview

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.

## Affected

- `open_webui < 0.11.1`

## Remediation

Upgrade past the affected range:

- `open_webui 0.11.1`