CVE-2016-2808: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

The watch implementation in the JavaScript engine in Mozilla Firefox before 46.0, Firefox ESR 38.x before 38.8, and Firefox ESR 45.x before 45.1 allows remote attackers to execute arbitrary code or cause a denial of service (generation-count overflow, out-of-bounds HashMap write access, and application crash) via a crafted web site.

Affected products

• Mozilla Firefox: up to and including 45.0.2; version 38.0 only; version 38.0.1 only; version 38.0.5 only; version 38.1.0 only; version 38.1.1 only; …

Published 2016-04-30. Last modified 2026-06-17.