CVE-2026-88001
Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redirect targets
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.
INFO
Published Date :
Sept. 9, 2026, 10:18 p.m.
Last Modified :
Sept. 14, 2026, 7:56 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Open WebUI to version 0.11.1 or newer.
- Ensure AIOHTTP_CLIENT_ALLOW_REDIRECTS is configured securely.
- Review server-side fetch configurations for security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-88001.
| URL | Resource |
|---|---|
| https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7 | Patch |
| https://github.com/open-webui/open-webui/pull/27823 | Issue Tracking Patch |
| https://github.com/open-webui/open-webui/releases/tag/v0.11.1 | Release Notes |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w | Exploit Vendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-88001 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-88001
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-88001 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-88001 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 14, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* versions from (including) 0.9.5 up to (excluding) 0.11.1 Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/pull/27823 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/releases/tag/v0.11.1 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 10, 2026
Action Type Old Value New Value Added Reference https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w Added SSVC {'id': 'CVE-2026-88001', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-10T13:40:15.988498Z'} -
New CVE Received by [email protected]
Sep. 09, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N Added CWE CWE-918 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/88xxx/CVE-2026-88001.json">CVE-2026-88001</a> Added Reference https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7 Added Reference https://github.com/open-webui/open-webui/pull/27823 Added Reference https://github.com/open-webui/open-webui/releases/tag/v0.11.1 Added Reference https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w