CVE-2016-5263: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 2.3% chance of exploitation in the next 30 days.

The nsDisplayList::HitTest function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 mishandles rendering display transformation, which allows remote attackers to execute arbitrary code via a crafted web site that leverages "type confusion."

Affected products

• Mozilla Firefox: up to and including 47.0.1; version 45.1.0 only; version 45.1.1 only; version 45.2.0 only; version 45.3.0 only
• Oracle Linux: version 5.0 only; version 6 only; version 7 only

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