CVE-2026-16723 — CRITICAL (9.0)

Vulnerability 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.

CVSS Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-20 CWE-502

References

https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Executi

FAQ

What is CVE-2026-16723?

CVE-2026-16723 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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, ...

How severe is CVE-2026-16723?

CVE-2026-16723 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-16723?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.