CVE-2009-2466: Mozilla Firefox

High severity, CVSS 10.0. EPSS: 6.6% chance of exploitation in the next 30 days.

The JavaScript engine in Mozilla Firefox before 3.0.12 and Thunderbird allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) nsDOMClassInfo.cpp, (2) JS_HashTableRawLookup, and (3) MirrorWrappedNativeParent and js_LockGCThingRT.

Affected products

• Mozilla Firefox: before 3.0.12 (fixed in 3.0.12)
• Mozilla Thunderbird: up to and including 3.0.11

Published 2009-07-22. Last modified 2026-06-16.