CVE-2026-28176: Booking Activities Team Booking Activities

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Unauthenticated PHP Object Injection in Booking Activities <= 1.18.4 versions.

Affected products

• Booking Activities Team Booking Activities: up to and including 1.18.4

Published 2026-08-13. Last modified 2026-08-14.