CVE-2009-3383: Mozilla Firefox

High severity, CVSS 10.0. EPSS: 4.3% chance of exploitation in the next 30 days.

Multiple unspecified vulnerabilities in the JavaScript engine in Mozilla Firefox 3.5.x before 3.5.4 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Affected products

• Mozilla Firefox: version 3.5.1 only; version 3.5.2 only; version 3.5.3 only

Published 2009-10-29. Last modified 2026-06-16.