AIKIDO-2026-819614

TL;DR

The Plotly.js Graphing module stores graph data as PHP-serialized strings, and in certain conditions an attacker can write crafted serialized data directly to that field, leading to a PHP Object Injection vulnerability when it's unserialized. Exploitation requires the attacker to have edit permissions on a content entity with a plotly_js_graph field, plus either JSON:API enabled with the non-default "accept all CRUD operations" setting, or some other means of writing directly to the field — which meaningfully limits real-world exploitability.