Opera GX Bug Let Hackers Auto-Install Malicious Add-Ons

Michael Miller · 2026-07-06

### The Flaw That Put Opera GX Users at Risk You might think your browser is safe from external attacks, but a recent discovery in Opera GX—the gaming-focused version of Opera—proves otherwise. Researchers uncovered a flaw that allowed a malicious website to silently install a browser add-on without any user interaction. Once installed, that add-on could lift sensitive data from the pages you visit. In a proof-of-concept test, they were able to reconstruct a signed-in user's full Gmail address after just a single visit. No click required. ### How the Attack Worked The vulnerability exploited Opera GX's built-in add-on installation mechanism. Normally, installing an extension requires your approval. But this bug bypassed that safeguard. A malicious site could trick the browser into thinking an add-on was legitimate and auto-install it. From there, the add-on could access data from any open tabs or visited pages. Think about what that means: your email, banking details, or private messages could be exposed. ### What Opera Did About It Opera has since patched the flaw. They claim they found no evidence that the bug was ever exploited in the wild. Still, it's a stark reminder that even trusted browsers can have blind spots. If you're using Opera GX, make sure you've updated to the latest version. Automatic updates should have kicked in, but it's worth double-checking. ### Why This Matters for Antidetect Browser Users Antidetect browsers are designed to protect your privacy and prevent data leaks. But this incident shows that even specialized browsers aren't invincible. If you're using antidetect browsers for sensitive work—like managing multiple accounts or protecting your digital footprint—you need to stay vigilant. A single unpatched flaw can undo all your privacy efforts. ### How to Protect Yourself - Keep your browser updated. Always install the latest version. - Avoid visiting untrusted websites, especially those that prompt you to install anything. - Use a reputable antidetect browser that prioritizes security patches. - Consider using a dedicated browser for high-risk activities. ### The Takeaway This flaw was a wake-up call. Opera GX users got lucky that it wasn't exploited, but the next vulnerability might not be so forgiving. Whether you're a gamer or a privacy-conscious professional, treat browser security as a priority. It's not just about convenience—it's about keeping your data safe.