CVE-2006-1742: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 4% chance of exploitation in the next 30 days.

The JavaScript engine in Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 does not properly handle temporary variables that are not garbage collected, which might allow remote attackers to trigger operations on freed memory and cause memory corruption.

Affected products

• Mozilla Firefox: up to and including 1.0.7; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …
• Mozilla Mozilla Suite: up to and including 1.7.12; version 1.7.6 only; version 1.7.7 only; version 1.7.8 only; version 1.7.10 only; version 1.7.11 only
• Mozilla Seamonkey: up to and including 1.0; version 1.0 only
• Mozilla Thunderbird: up to and including 1.0.7; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …

Published 2006-04-14. Last modified 2026-06-16.