Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sun, 18 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 13 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Open-webui
Open-webui open-webui
Vendors & Products Open-webui
Open-webui open-webui

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

Type Values Removed Values Added
Description Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.
Title Open WebUI 0.6.33 before 0.11.4 Stored XSS via Citation embed_url
First Time appeared Openwebui
Openwebui open Webui
Weaknesses CWE-79
CPEs cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Vendors & Products Openwebui
Openwebui open Webui
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-18T12:03:15.402Z

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

Link: CVE-2026-109291

cve-icon Vulnrichment

Updated: 2026-10-18T11:53:18.630Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-12T17:17:22.353

Modified: 2026-10-18T12:17:04.147

Link: CVE-2026-109291

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T05:30:17Z

Weaknesses