NPM · AUGUST 2026 · EARLY WARNING

Open WebUI Vulnerability: Same-Origin XSS to Account Takeover

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.
Severity
HIGH
Affected component
open webui (npm)
Patched version
0.11.0
GHSA-3XPF-XQ7R-V8C5

An authenticated user with access to a terminal server in Open WebUI could reportedly run arbitrary scripts in the application's origin, leading to full account takeover. This vulnerability is under investigation.

What happened

The vulnerability arises from the iframe sandbox settings allowing same-origin access and script execution. This could enable an authenticated user to execute arbitrary scripts, leading to a potential account takeover. The issue has been flagged and is currently under investigation.

The affected component is the open webui npm package. Versions prior to 0.11.0 are reportedly vulnerable. Users of these versions should take immediate action to assess their exposure and apply the recommended mitigations.

What to do about it

How 0Day would have caught this

MATCHED TO YOUR ACTUAL DEPENDENCY GRAPH0Day matches every incoming threat signal against your GitHub organization’s full dependency graph, including transitive dependencies. If open webui is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.

Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.

Frequently asked questions

Am I affected?

If you are using open webui npm package versions prior to 0.11.0, you are reportedly affected.

What should I do right now?

Upgrade to Open WebUI version 0.11.0 or later to mitigate the risk of account takeover.

What is the current status of this vulnerability?

This is an early warning. The vulnerability is under investigation and has not been confirmed as exploited in the wild.

Where can I find more information?

Consult the primary sources for the most up-to-date information on this vulnerability.

Sources

Join the 0Day waitlist →

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