---
id: CVE-2026-109294
title: >-
  Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource
  consumption vulnerability that allows authenticated users to exhaust server
  memory by supplying compressed remote image URLs in chat messages
summary: >-
  Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource
  consumption vulnerability that allows authenticated users to exhaust server
  memory by supplying compressed remote image URLs in chat messages. Attackers
  can point the…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:22.800'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109294'
references:
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-w8j8-jv6j-3m47
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/open-webui-0.6.42-before-0.11.4-memory-exhaustion-via-compressed-remote-image
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.192Z'
---

## Overview

Open WebUI from 0.6.42 before 0.11.4 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by supplying compressed remote image URLs in chat messages. Attackers can point the image field at a host returning gzip-encoded responses, which get_image_base64_from_url decompresses unbounded, causing denial of service for all users.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.