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.
Advisories

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Fri, 23 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-409

Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 12 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Open WebUI 0.6.42 before 0.11.4 Memory Exhaustion via Compressed Remote Image
First Time appeared Openwebui
Openwebui open Webui
Weaknesses CWE-400
CPEs cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Vendors & Products Openwebui
Openwebui open Webui
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-23T21:57:56.633Z

Reserved: 2026-10-12T14:12:52.833Z

Link: CVE-2026-109294

cve-icon Vulnrichment

Updated: 2026-10-13T15:49:07.575Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-12T17:17:22.800

Modified: 2026-10-23T22:16:54.333

Link: CVE-2026-109294

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T23:30:17Z

Weaknesses