Docker labs + defensive scanner for fastjson remote-class-load RCE. fastjson 1.2.66-1.2.83: @JSONType resource probe (CVE-2026-16723). fastjson2 2.0.57: attacker @type reaches loadClass with autoType DISABLED via polymorphic types (@JSONType(seeAlso) / Jackson @JsonSubTypes). Marker-only payloads; safeMode + JDK17 controls.
What is the dinosn/fastjson-jsontype-rce-lab GitHub project? Description: "Docker labs + defensive scanner for fastjson remote-class-load RCE. fastjson 1.2.66-1.2.83: @JSONType resource probe (CVE-2026-16723). fastjson2 2.0.57: attacker @type reaches loadClass with autoType DISABLED via polymorphic types (@JSONType(seeAlso) / Jackson @JsonSubTypes). Marker-only payloads; safeMode + JDK17 controls.". Written in Python. Explain what it does, its main use cases, key features, and who would benefit from using it.
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