PANews reported on April 21 that 23pds, Chief Information Security Officer of SlowMist, posted a warning on the X platform that Claude Desktop has been found to secretly write browser backdoor files. When a user installs the Claude Desktop application, the application writes a special file to all Chromium-based browsers on the user's computer without their knowledge. This file is essentially a pre-authorized backdoor, which, when used in conjunction with specific browser extensions, can gain complete control over the user's browser.