CVE-2010-1203: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 3.9% chance of exploitation in the next 30 days.

The JavaScript engine in Mozilla Firefox 3.6.x before 3.6.4 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors that trigger an assertion failure in jstracer.cpp.

Affected products

• Mozilla Firefox: version 3.6 only; version 3.6.2 only; version 3.6.3 only

Published 2010-06-24. Last modified 2026-06-16.