CVE-2026-16723
A critical remote code execution vulnerability exists in the fastjson library, versions 1.2.68 through 1.2.83. Attackers can run arbitrary code on a system that uses these versions, even with the library's default configuration. The flaw is due to improper input validation and deserialization handling.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
fastjson 1.2.68 through 1.2.83, used in Java applications that rely on this JSON parsing library.
Real-world impact
An attacker could execute arbitrary code, take control of the affected system, steal data, or disrupt services.
Why this severity
The CVSS score of 9 reflects that the vulnerability allows remote code execution with no user interaction, high impact on confidentiality, integrity, and availability, and requires no special privileges.
What to do about it
- ›Avoid using fastjson 1.2.68-1.2.83 or remove it from the application.
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
NVD description