A severe security vulnerability has been found in the Chromium browser, which can cause widespread crashes across billions of users. The vulnerability, discovered by security researcher Jose Pino, affects the Blink rendering engine in Chromium-based browsers, including Chrome, Edge, Brave, and Vivaldi. The issue exploits a lack of rate limiting on the document.title API, allowing for millions of DOM changes to be injected per second, leading to a crash of the main thread and rendering the browser interface unusable. Pino reported the vulnerability to the Chromium security team on August 28, but did not receive a response. Testing has shown that the vulnerability can cause the browser to crash and consume significant system resources, in some cases even freezing the entire system. Browsers using other rendering engines, such as Firefox and Safari, are not affected. Google has stated that it is investigating the issue, while Brave has announced that it will implement a fix once one is provided by Chromium.