CVE-2008-5822: Mozilla Libxul

Medium severity, CVSS 5.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Memory leak in Libxul, as used in Mozilla Firefox 3.0.5 and other products, allows remote attackers to cause a denial of service (memory consumption and browser hang) via a long CLASS attribute in an HR element in an HTML document.

Affected products

• Mozilla Libxul: any version

Published 2009-01-02. Last modified 2026-06-16.