The Hijacked Clipboard
Google Chrome features an asynchronous Clipboard API that allows web applications to read from and write to your system’s physical clipboard. While intended for legitimate web apps (like Google Docs copying and pasting text), it is heavily abused by malicious websites. If you highlight a piece of code or text on a shady blog and press Ctrl+C, the website can intercept that action and silently inject a malicious script or a different URL into your clipboard instead. When you paste it later, you execute the payload. To protect your system clipboard, you must permanently paralyze this API.
How to Block Clipboard Access Globally
You can permanently sever the browser’s ability to manipulate your copy/paste buffer via the Site Settings.
- Open the Google Chrome desktop browser.
- Click the three vertical dots (⋮) in the top right corner and select Settings.
- In the left-hand sidebar, click on Privacy and security.
- In the main window, click on Site settings.
- Scroll down to the “Permissions” heading and click to expand Additional permissions.
- Click on Clipboard (or “Clipboard on your device”).
- Under the “Default behavior” heading, select the radio button for “Don’t allow sites to see text or images on your clipboard.”
Absolute Copy/Paste Security
The change takes effect instantly. Google Chrome will completely sever its internal connection to the Windows or macOS clipboard registry. The browser will instantly auto-reject every single background script attempting to hijack your Ctrl+C or Ctrl+V actions. You can still manually highlight text and copy it using your operating system’s native shortcuts, but websites are now strictly forbidden from programmatically altering or reading the contents of your clipboard.