CVE-2026-73389: THE4 Kalles Addons

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

Unauthenticated PHP Object Injection in Kalles Addons <= 1.0.6 versions.

Affected products

• THE4 Kalles Addons: up to and including 1.0.6

Published 2026-08-19. Last modified 2026-08-20.