Is CVE-2026-16723 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-16723?

CVE-2026-16723 has a CVSS v3 severity of CRITICAL (9).

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CVE-2026-16723

Description

A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson's stock default configuration — no AutoType enablement required, no classpath gadget required.