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AI agent vulnerability · Open WebUI

GHSA-6wj5-5pgr-jwq8: Open WebUI Unauthenticated Multipart Boundary Denial of Service (DoS) Vulnerability in api/chat/file

highCVSS 3.0 7.5

A vulnerability in open-webui/open-webui version 79778fa allows an attacker to cause a Denial of Service (DoS) by uploading a file with a malformed multipart boundary. By appending a large number of characters to the end of the multipart boundary, the server continuously processes each character, rendering the application inaccessible.

Published Mar 20, 2025 · Updated Apr 15, 2025

Affected packages

open-webui

Ecosystem
PyPI
Affected
< 0.4.7
Fixed in
0.4.7
Check
pip show open-webui

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

A vulnerability in open-webui/open-webui version 79778fa allows an attacker to cause a Denial of Service (DoS) by uploading a file with a malformed multipart boundary. By appending a large number of characters to the end of the multipart boundary, the server continuously processes each character, rendering the application inaccessible. This issue can prevent all users from accessing the application until the server recovers.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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