CVE-2012-3561: Opera Browser

High severity, CVSS 10.0. EPSS: 5.2% chance of exploitation in the next 30 days.

Opera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted string.

Affected products

• Opera Opera Browser: up to and including 11.62; version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; …

Published 2012-06-14. Last modified 2026-06-16.