CVE-2026-2760
CriticalCVSS 10.0Exploitation Probability (EPSS)
Low risk31th percentile - higher than 31% of all known CVEs
Summary
A vulnerability in the WebRender component of Firefox and Thunderbird allows sandbox escape due to incorrect boundary conditions in graphics. The flaw is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Risk Assessment
An attacker can exploit this vulnerability to escape the sandbox, potentially leading to arbitrary code execution in the user's context and full system compromise.
Recommendation
Immediately update Firefox to version 148 or later, ESR versions to 115.33/140.8, and Thunderbird to version 148 or 140.8.
Original NVD description (English source)
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.