A Newly Discovered Browser Extension Can Hijack AI Assistants Across Multiple Browsers, Exposing Users to Potential Cyber Attacks
A recently uncovered vulnerability in a popular browser extension has raised significant concerns about the security of artificial intelligence (AI) assistants across multiple browsers. The extension, which we’ll refer to as “the vulnerable extension,” has been found to have the capability to hijack AI assistants on Chrome, Comet, Edge, Opera Neon, and Claude. This means that users who have installed this extension on their browser are at risk of having their sensitive information exposed and potentially falling victim to cyber attacks.
The vulnerable extension in question is designed to provide users with enhanced functionality and features for interacting with AI-powered services. However, our investigation has revealed that the extension contains a critical flaw that allows it to exploit cross-domain privilege escalation vulnerabilities. This means that the extension can bypass security restrictions and access sensitive information on other websites, including those protected by secure protocols like HTTPS.
The implications of this vulnerability are far-reaching, as many users rely on AI assistants for various tasks such as password management, email automation, and even voice control. If an attacker were to compromise one of these AI assistants, they could potentially gain access to sensitive information stored on the user’s device or online accounts. This could lead to identity theft, financial loss, and other types of cyber attacks.
One of the primary concerns surrounding this vulnerability is that it can be used to map cross-domain privilege escalation to sever breach routes at key choke points. In simpler terms, an attacker could use the vulnerable extension to identify vulnerabilities in other websites or applications and exploit them to gain unauthorized access. This creates a ripple effect, where one compromised AI assistant could lead to multiple breaches across different systems.
The discovery of this vulnerability highlights the importance of scrutinizing browser extensions and their capabilities. While many extensions are designed to enhance user experience, some may contain hidden risks that can compromise security. As AI assistants become increasingly integrated into our digital lives, it’s essential for users to be aware of these potential threats and take steps to mitigate them.
To protect yourself from this vulnerability, we recommend exercising caution when installing browser extensions, especially those related to AI-powered services. Always research the extension’s reputation, read reviews, and check its ratings before installation. Additionally, keep your browser and operating system up-to-date with the latest security patches, as these can help prevent exploitation of vulnerabilities like this one. By being vigilant and taking proactive measures, you can reduce the risk of falling victim to cyber attacks and protect your sensitive information from exposure.
Source: The Hacker News — 2026-09-16