Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, his advisory tracks a regression of the original Excel-preview XSS (CVE-2026-44549). The same root cause — XLSX.utils.sheet_to_html() output rendered via {@html excelHtml} without DOMPurify — was reintroduced sometime after v0.8.0 and is exploitable again This vulnerability is fixed in 0.9.3.
References
| Link | Resource |
|---|---|
| https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc | Exploit Mitigation Vendor Advisory |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc | Exploit Mitigation Vendor Advisory |
Configurations
History
18 May 2026, 20:12
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* | |
| First Time |
Openwebui
Openwebui open Webui |
|
| References | () https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc - Exploit, Mitigation, Vendor Advisory |
18 May 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/open-webui/open-webui/security/advisories/GHSA-hcwp-82g6-8wxc - |
15 May 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-15 22:16
Updated : 2026-05-18 20:12
NVD link : CVE-2026-45318
Mitre link : CVE-2026-45318
CVE.ORG link : CVE-2026-45318
JSON object : View
Products Affected
openwebui
- open_webui
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')