By far, the most commonly-reported “vulnerability” reported to the Chrome Vulnerability Rewards program boils down to “I can steal my own password.” Despite having its very own FAQ entry, this gets reported to the VRP at varying levels of breathlessness, sometimes multiple times per day.
You can see this “attack” in action:
Yes, it’s true, you can use Chrome to steal your own password.
-Eric
PS: “But… but… what if I don’t want to use this easy trick and instead steal my own passwords from myself by installing some software on my own PC? Isn’t that a security bug?”
No, although “Software can read passwords if I give it full permission to run on my computer” is probably the third or fourth most common non-bug reported to Chromium’s Security@ alias. https://crbug.com/678171 is one of many such filings.
Chrome does use encryption when storing passwords in most cases. However, Chrome has the decryption key (necessarily). You can read more about why an attacker who has physical access or has compromised your machine is outside of the browser’s threat model.
