CVE-2006-3806: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 5.5% chance of exploitation in the next 30 days.

Multiple integer overflows in the Javascript engine in Mozilla Firefox before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3 might allow remote attackers to execute arbitrary code via vectors involving (1) long strings in the toSource method of the Object, Array, and String objects; and (2) unspecified "string function arguments."

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
• Mozilla Thunderbird: version 1.5 only; version 1.5.0.2 only; version 1.5.0.4 only

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