Find real vulnerabilities before they ship
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.
Base Score
5.4| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| open-webui(PyPI) | 0 | 0.9.3 | N/A |
| Base Score | 5.4 |
|---|---|
| Vector String | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| Base Severity | Medium |
| Version | 3.1 |
| Attack Vector (AV) | NETWORK |
