A vulnerability was discovered in ComfyUI-Easy-Use version 1.4.1 and earlier, which allows an unauthenticated attacker to execute arbitrary code when the application restarts. The vulnerability occurs when an attacker uploads a malicious Python file to ComfyUI's input directory and uses the save_preview() handler to overwrite an installed custom node's __init__.py file. This allows the attacker to execute code with the privileges of the ComfyUI process, potentially accessing sensitive data and credentials. To mitigate the vulnerability, developers should either remove the ComfyUI-Easy-Use extension or restrict network access to trusted users. A fix has been released in commit 8a0f2fc412, but the maintainer could not be reached to coordinate the vulnerability disclosure.