Open WebUI Allows Arbitrary File Write via the `/models/upload` Endpoint

In open-webui version 0.3.8, the endpoint /models/upload is vulnerable to arbitrary file write due to improper handling of user-supplied filenames. The vulnerability arises from the usage of filepath = f"UPLOADDIR/file.filename" without proper input validation or sanitization. An attacker can...

PYSEC-2026-1730 Open WebUI Allows Arbitrary File Write via the `/models/upload` Endpoint

In open-webui version 0.3.8, the endpoint /models/upload is vulnerable to arbitrary file write due to improper handling of user-supplied filenames. The vulnerability arises from the usage of filepath = f"UPLOADDIR/file.filename" without proper input validation or sanitization. An attacker can...

Directory Traversal

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Directory Traversal through the /models/upload endpoint. An attacker can manipulate the file.filename parameter to include directory traversal sequences, causing the resulting filepath to escape the intended...

Open WebUI 路径遍历漏洞

Open WebUI is an extensible, feature-rich, user-friendly self-hosted WebUI from Open WebUI open source. A path traversal vulnerability exists in Open WebUI version 0.3.8, which stems from improper handling of filenames in the /models/upload endpoint, which could lead to arbitrary file writes...