# CVE-2026-88001 — open-webui

> As of 2026-09-10, CVE-2026-88001 is a MEDIUM-severity vulnerability in open-webui, CVSS v3.1 5, EPSS 0.2% (18.9th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-88001 as of 2026-09-10; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-10

## What is CVE-2026-88001?

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.

The record classifies CVE-2026-88001 under weakness class [CWE-918](https://intel.threadlinqs.com/cwe/CWE-918). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 26 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 18.9% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-09, last modified 2026-09-10

## Is CVE-2026-88001 being exploited?

It currently carries a trending score of 34 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [open-webui](https://intel.threadlinqs.com/vendors/open-webui): open-webui

Affected software packages:

- `pip:open-webui` — patched in 0.11.1

## How to fix CVE-2026-88001

Fixed versions are recorded for 1 package: pip:open-webui 0.11.1. No vendor patch reference has been recorded for CVE-2026-88001 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-88001

No threat campaign in the Threadlinqs corpus currently references CVE-2026-88001, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-11.

**Vendor advisory and patch**

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

**Other references**

- [github.com](https://github.com/open-webui/open-webui/pull/27823)
- [github.com (e3e4bd87df6fc629e7e22081d980d55a7632b8b7)](https://github.com/open-webui/open-webui/commit/e3e4bd87df6fc629e7e22081d980d55a7632b8b7)
- [github.com (v0.11)](https://github.com/open-webui/open-webui/releases/tag/v0.11.1)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-88001
Full detection coverage and IOCs for threats exploiting CVE-2026-88001 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp