Odaily Planet Daily News According to Slow Fog CISO @im23pads's post on X platform, Claude Desktop has been reported to secretly write a browser backdoor file. When users install the Claude Desktop application, it will write a special file to all Chromium-based browsers on the computer without the user's knowledge. This file serves as a pre-authorized backdoor, and once used in conjunction with specific browser extensions, it can obtain full control over the user's browser.