CVE-2016-5266: Mozilla Firefox

High severity, CVSS 8.1. EPSS: 1.7% chance of exploitation in the next 30 days.

Mozilla Firefox before 48.0 does not properly restrict drag-and-drop (aka dataTransfer) actions for file: URIs, which allows user-assisted remote attackers to access local files via a crafted web site.

Affected products

• Mozilla Firefox: up to and including 47.0.1

Published 2016-08-05. Last modified 2026-06-17.