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HIGHCVE-2026-44549Published Modified CNA GitHub_M

CVE-2026-44549: Open WebUI: Stored XSS in excel file preview

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.

Metrics

CVSS v3.1
7.3
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • open-webui / open-webui
    < 0.8.0
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
References