High severity7.3GHSA Advisory· Published May 15, 2026

CVE-2026-44549

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
open-webuiPyPI	< 0.8.0	0.8.0

Affected products

Openwebui/Open WebuiGHSA
Range: <= 0.7.2

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/advisories/GHSA-jwf8-pv5p-vhmcghsaADVISORY
github.com/open-webui/open-webui/security/advisories/GHSA-jwf8-pv5p-vhmcnvdWEB

News mentions

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cvss	0.474
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000