CVE-2006-3801: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 4.4% chance of exploitation in the next 30 days.

Mozilla Firefox 1.5 before 1.5.0.5 and SeaMonkey before 1.0.3 does not properly clear a JavaScript reference to a frame or window, which leaves a pointer to a deleted object that allows remote attackers to execute arbitrary native code.

Affected products

• Mozilla Firefox: version 1.5 only; version 1.5.0.1 only; version 1.5.0.2 only; version 1.5.0.3 only; version 1.5.0.4 only
• Mozilla Seamonkey: version 1.0 only; version 1.0.1 only; version 1.0.2 only

Published 2006-07-27. Last modified 2026-06-16.