CVE-2008-4166: Avantbrowser Avant Browser

Medium severity, CVSS 4.3. EPSS: 2.2% chance of exploitation in the next 30 days.

Integer overflow in the JavaScript engine in Avant Browser 11.7 Build 9 and earlier allows remote attackers to cause a denial of service (application crash) by attempting to URL encode a string containing many instances of an invalid character.

Affected products

• Avantbrowser Avant Browser: up to and including 11.7

Published 2008-09-22. Last modified 2026-06-16.