NPM · AUGUST 2026 · EARLY WARNING

Open WebUI Vulnerability: Potential Same-Origin XSS Threat

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.

GHSA-3XPF-XQ7R-V8C5Severity: HIGH

An authenticated user with access to a terminal server in Open WebUI could reportedly run arbitrary scripts in the application origin, potentially leading to full account takeover. This vulnerability appears to be due to the iframe sandbox settings allowing same-origin access and scripts.

What happened

The vulnerability under investigation (Tracked ID: GHSA-3XPF-XQ7R-V8C5) involves the iframe sandbox settings in Open WebUI, which may allow same-origin access and script execution. This could enable an authenticated user to run arbitrary scripts, leading to a potential account takeover. The issue is reportedly fixed in Open WebUI version 0.11.0 or later. Users of affected versions (<0.11.0) should consider upgrading as a precautionary measure. For more details, consult the primary sources provided.

How 0Day mitigates 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.

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