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CVE-2026-88001

🔶 medium
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Summary

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 t

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.

CVSS Score
5.0
Medium
EPSS Score
0.3
Exploit Probability
Published Date
2026-09-09
First Seen: 2026-09-11
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 18.6% of all 360,548 vulnerabilities in our database.

#293,402
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Sep 10, 2026
🔍 Exploitation Status
Poc
Proof-of-concept available
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-09-14
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CWE IDs (Weakness Types)
CWE-918

📦 Affected Products 1

Vendor Product Status Affected Versions
openwebui open_webui Affected
> 0.9.5 < 0.11.1

🔗 References 4

https://github.com/open-webui/open-webui/commit/e3e4...
Patch
https://github.com/open-webui/open-webui/pull/27823
Issue Tracking Patch
https://github.com/open-webui/open-webui/releases/ta...
Release Notes
https://github.com/open-webui/open-webui/security/ad...
Exploit Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-88005 🔶 medium 6.5 0.2 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, Open WebUI... 2026-09-10
CVE-2026-88006 🔶 medium 6.5 0.2 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.11.1, Open WebU... 2026-09-10
CVE-2026-87011 ⚠️ high 7.5 0.4 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, the unaut... 2026-09-09
CVE-2026-87012 🔶 medium 4.3 0.3 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/o... 2026-09-09
CVE-2026-87013 🔶 medium 4.3 0.3 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /ap... 2026-09-09
CVE-2026-87014 🔶 medium 6.5 0.3 Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, role sync... 2026-09-09
These CVEs affect the same products