CVE-2006-2780: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 7.3% chance of exploitation in the next 30 days.

Integer overflow in Mozilla Firefox and Thunderbird before 1.5.0.4 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via "jsstr tagify," which leads to memory corruption.

Affected products

• Mozilla Firefox: up to and including 1.5.0.3
• Mozilla Thunderbird: up to and including 1.5.0.3

Published 2006-06-02. Last modified 2026-06-16.