Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, Excel file attachments are previewed in an unsafe way. A crafted XLSX file payload can be used to cause the sheetjs function sheet_to_html to embed an XSS payload into the generated HTML. This is subsequently added to the DOM unsanitized via @html causing the payload to trigger. This vulnerability is fixed in 0.8.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.8.0 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmcExploitVendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmcExploitVendor Advisory
FAQ
What is CVE-2026-44549?
CVE-2026-44549 is a vulnerability with a CVSS score of 7.3 (HIGH). Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, Excel file attachments are previewed in an unsafe way. A crafted XLSX file payload ca...
How severe is CVE-2026-44549?
CVE-2026-44549 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44549?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.