CVE-2026-66672: Monkeysan Flatastic

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Unauthenticated PHP Object Injection in Flatastic <= 2.0 versions.

Affected products

• Monkeysan Flatastic: up to and including 2.0

Published 2026-08-20. Last modified 2026-08-20.