The vulnerability stems from unsafe YAML deserialization using SnakeYAML's default configuration. Runtime detection would show:

1. The core SnakeYAML load() method being called with attacker-controlled input
2. Magnolia's YAML processing entry points that accept user-supplied YAML While exact patch details are unavailable, the PoC and vulnerability nature indicate these functions would appear in stack traces during exploitation when malicious YAML is processed.