[CRITICAL] Mautic has Server-Side Template Injection (SSTI) in Theme Templates

PKSA-5wpq-7gbm-cqxv CVE-2026-9558 GHSA-9fx4-7cmj-47vg

Affected package: mautic/core

Affected version: >=7.0.0,<7.1.2|>=6.0.0,<6.0.9|>=5.0.0,<5.2.11|>=1.3.0,<4.4.13

Reported by:
GitHub