CVE-2007-6523: Opera Browser

High severity, CVSS 7.8. EPSS: 2.1% chance of exploitation in the next 30 days.

Algorithmic complexity vulnerability in Opera 9.50 beta and 9.x before 9.25 allows remote attackers to cause a denial of service (CPU consumption) via a crafted bitmap (BMP) file that triggers a large number of calculations and checks.

Affected products

• Opera Opera Browser: version 9.0 only; version 9.01 only; version 9.02 only; version 9.10 only; version 9.12 only; version 9.20 only; …

Published 2007-12-24. Last modified 2026-06-16.