PYPI · SEPTEMBER 2026 · EARLY WARNING

Open WebUI Vulnerability: Authenticated Users Can Access Azure Services

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 (pypi)
Patched version
Not yet available
GHSA-34R3-9M95-VQ73

An early warning has been issued for a vulnerability in Open WebUI that allows authenticated users to reach Azure services via server-side web fetch. This issue is under investigation.

What happened

Open WebUI reportedly fetches user-supplied URLs on the server for RAG URL ingestion and web search. This allows authenticated users to issue requests to internal Azure addresses, potentially leading to unauthorized access to internal services. The vulnerability, tracked as GHSA-34R3-9M95-VQ73, was first flagged on 2026-09-10T15:09:36+00:00. It is classified as high severity.

The vulnerability has not been exploited in the wild as of the latest reports. It is recommended to upgrade to a version where the `WEB_FETCH_FILTER_LIST` is configured to block internal addresses or set `ENABLE_LOCAL_WEB_FETCH` to `false`.

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, you may be affected. Consult the primary sources for more details.

What should I do right now?

Configure the `WEB_FETCH_FILTER_LIST` to block internal addresses or set `ENABLE_LOCAL_WEB_FETCH` to `false`. Monitor the primary sources for updates.

Is there an official fix available?

No official fix has been published yet. Monitor the primary sources for updates.

Sources

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