Memory Safety Vulnerability in Firefox and Thunderbird by Mozilla
CVE-2026-2792

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox; Firefox Esr; Thunderbird
Vendor: CVE Published:; 24 February 2026

What is CVE-2026-2792?

The vulnerability involves memory safety bugs in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147, and Thunderbird 147. These bugs exhibit signs of memory corruption, suggesting that with appropriate exploitation efforts, they could potentially lead to arbitrary code execution. Users of versions prior to Firefox 148 and Thunderbird 148, as well as their respective ESR versions, should take immediate action to update and secure their systems.

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