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Researchers Show a Single Malicious Webpage Visit Can Compromise Tor Browser

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Researchers Show a Single Malicious Webpage Visit Can Compromise Tor Browser

Researchers at Nebula Security demonstrated that a patched Firefox JIT compiler flaw (CVE-2026-10702) could be exploited to achieve arbitrary code execution in the browser's renderer process with no user interaction beyond visiting a malicious webpage. The vulnerability, which Mozilla rated High severity, was also successfully used to compromise Tor Browser and was addressed in Firefox 151.0.3.

Why it matters: All Firefox and Tor Browser users need to update immediately, as the vulnerability requires no user interaction beyond a website visit and provides direct code execution inside the browser process.

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Correction

Correction recorded as of .

vulnerabilities

Researchers Show a Single Malicious Webpage Visit Can Compromise Tor Browser

Researchers at Nebula Security demonstrated that a patched Firefox JIT compiler flaw (CVE-2026-10702) could be exploited to achieve arbitrary code execution in the browser's renderer process with no user interaction beyond visiting a malicious webpage. The vulnerability, which Mozilla rated High severity, was also successfully used to compromise Tor Browser and was addressed in Firefox 151.0.3.

Why it matters: All Firefox and Tor Browser users need to update immediately, as the vulnerability requires no user interaction beyond a website visit and provides direct code execution inside the browser process.

Source published
First seen by Cybersecurity Tracker

Source attribution

Glossary