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CVE-2026-26193

Openwebui Open Webui cross-site scripting (XSS)

7.3 HIGHPublic exploitEPSS 0.31%
  1. Published19 Feb 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.6.44, aanually modifying chat history allows setting the `embeds` property on a response message, the content of which is loaded into an iFrame with a sandbox that has `allow-scripts` and `allow-same-origin` set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS on the affected chat. This also triggers when the chat is in the shared format. The result is a shareable link containing the payload that can be distributed to any other users on the instance. Version 0.6.44 fixes the issue.

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< 0.6.44

Remediation

Fixed in
Openwebui Open Webui≥ 0.6.44

References

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Frequently asked

Is CVE-2026-26193 being actively exploited?

CVE-2026-26193 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.31%.

How severe is CVE-2026-26193?

CVE-2026-26193 has a CVSS 3.1 base score of 7.3, rated high. EPSS estimates a 0.31% probability of exploitation.

Which products are affected by CVE-2026-26193?

Affected products include Openwebui Open Webui.

How do I fix CVE-2026-26193?

Upgrade affected software to a fixed version, for example Openwebui Open Webui 0.6.44 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-26193 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.