FastJson RCE vulnerability CVE-2026-16723 is exploited in the wild. Details and PoC exploit code are public for this critical remote code execution flaw.
CVE-2026-16723
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.