CVE-2026-78265: Nexcess The Events Calendar

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

Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.

Affected products

• Nexcess The Events Calendar: up to and including 6.17.2

Published 2026-08-24. Last modified 2026-08-26.