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Exploits
ID:13083 - Exploit for Input validation error in Fastjson - CVE-2026-16723
ID:13083 - Exploit for Input validation error in Fastjson - CVE-2026-16723
Published: October 2, 2026
Vulnerability identifier: #VU140629
Vulnerability risk: Critical
CVE-ID: CVE-2026-16723
CWE-ID: CWE-20
Exploitation vector: Remote access
Vulnerable software:
Fastjson
Fastjson
Link to public exploit:
Vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper input validation in fastjson type resolution logic when parsing user-supplied JSON input. A remote attacker can send a specially crafted JSON payload to execute arbitrary code.
Exploitation requires the application to run as a Spring Boot executable fat-jar under the default configuration with AutoType disabled and SafeMode disabled.
Remediation
Install security update from vendor's website.