CVE-2016-2811: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the ServiceWorkerInfo class in the Service Worker subsystem in Mozilla Firefox before 46.0 allows remote attackers to execute arbitrary code via vectors related to the BeginReading method.

Affected products

• Mozilla Firefox: up to and including 45.0.2

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