AI agent vulnerability · Open WebUI

GHSA-5ccf-884p-4jjq: Open WebUI Unauthenticated Multipart Boundary Denial of Service (DoS) Vulnerability

highCVSS 3.0 7.5

A Denial of Service (DoS) vulnerability exists in open-webui/open-webui version 0.3.21. This vulnerability affects multiple endpoints, including /ollama/models/upload, /audio/api/v1/transcriptions, and /rag/api/v1/doc. The application processes multipart boundaries without authentication, leading to resource exhaustion.

Published Mar 20, 2025 · Updated Apr 15, 2025

Affected packages

open-webui

Ecosystem: npm
Affected: <= 0.3.21
Fixed in: No patched version yet
Check: npm ls open-webui

open-webui

Ecosystem: PyPI
Affected: <= 0.3.21
Fixed in: No patched version yet
Check: pip show open-webui

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

A Denial of Service (DoS) vulnerability exists in open-webui/open-webui version 0.3.21. This vulnerability affects multiple endpoints, including /ollama/models/upload, /audio/api/v1/transcriptions, and /rag/api/v1/doc. The application processes multipart boundaries without authentication, leading to resource exhaustion. By appending additional characters to the multipart boundary, an attacker can cause the server to parse each byte of the boundary, ultimately leading to service unavailability. This vulnerability can be exploited remotely, resulting in high CPU and memory usage, and rendering the service inaccessible to legitimate users.

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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