Is CVE-2026-45401 actively exploited?

No active exploitation of CVE-2026-45401 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-45401 be exploited remotely?

Yes. CVE-2026-45401 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-45401?

CVE-2026-45401 has a CVSS score of 8.5 (HIGH).

HOME VULNERABILITIESCVE-2026-45401

HIGH

CVE-2026-45401

CWE-918Published: May 15, 2026· Updated: May 19, 2026

8.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:10.2th

Official Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the validate_url() function in backend/open_webui/retrieval/web/utils.py only validates the initial URL submitted by the caller. The HTTP clients used downstream (sync requests, async aiohttp, langchain's WebBaseLoader) follow HTTP 3xx redirects by default and do not re-validate the redirect target against the private-IP / metadata-IP block list. Any authenticated user can therefore submit a public URL that 302-redirects to an internal address (e.g. 127.0.0.1, 169.254.169.254, RFC1918) and read the internal response body via the /api/v1/retrieval/process/web endpoint, the /api/v1/images/... endpoints, the /api/chat/completions endpoint with an image_url content part, and any other route that calls these helpers. This vulnerability is fixed in 0.9.5.

NVD Source

Technical Analysis

CVE-2026-45401 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 8.5.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.