QVD-2026-43021

Public PoC Exploit Released for fastjson 1.2.83 Remote Code Execution Flaw

fastjson RCE vulnerability in versions 1.2.68 to 1.2.83 with public PoC exploit code

Public PoC Exploit Released for fastjson 1.2.83 Remote Code Execution Flaw

Do Son July 22, 2026

A fastjson RCE hits versions 1.2.68 to 1.2.83 under stock defaults. Details and public PoC code are out, so enable SafeMode or move to fastjson2.

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