CVE-2006-0749: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 10.5% chance of exploitation in the next 30 days.

nsHTMLContentSink.cpp 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 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors involving a "particular sequence of HTML tags" that leads to memory corruption.

Affected products

• Mozilla Firefox: from 1.0, before 1.5 (fixed in 1.5)
• Mozilla Mozilla Suite: before 1.7.13 (fixed in 1.7.13)
• Mozilla Seamonkey: before 1.0 (fixed in 1.0)
• Mozilla Thunderbird: from 1.0, before 1.0.8 (fixed in 1.0.8)

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