CVE-2026-27437: Themerex Tennis Club

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

Deserialization of Untrusted Data vulnerability in ThemeREX Tennis Club tennis-sportclub allows Object Injection.This issue affects Tennis Club: from n/a through <= 1.2.3.

Affected products

• Themerex Tennis Club: up to and including 1.2.3

Published 2026-03-05. Last modified 2026-06-17.