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CVE-2026-44549

Openwebui Open Webui cross-site scripting (XSS)

7.3 HIGHPublic exploitEPSS 0.37%
  1. Published15 May 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Affected products

Openwebui Open Webui< 0.8.0

Remediation

Fixed in
Openwebui Open Webui≥ 0.8.0

References

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Frequently asked

Is CVE-2026-44549 being actively exploited?

CVE-2026-44549 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.37%.

How severe is CVE-2026-44549?

CVE-2026-44549 has a CVSS 3.1 base score of 7.3, rated high. EPSS estimates a 0.37% probability of exploitation.

Which products are affected by CVE-2026-44549?

Affected products include Openwebui Open Webui.

How do I fix CVE-2026-44549?

Upgrade affected software to a fixed version, for example Openwebui Open Webui 0.8.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-44549 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.