CVE-2026-16723
Remote Code Execution in fastjson 1.2.68–1.2.83
- Published
- Jul 23, 2026
- Updated
- Jul 23, 2026
- Assigning CNA
- alibaba
- Evidence observed
- Aug 12, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 96.8%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
7- CVE-2026-16723Exploit
PoC exploit for Fastjson RCE (CVE-2026-16723) featuring automated JAR payload generation and delivery via crafted JSON, bypassing AutoType restrictions.
- fastjson-cvePoC
Reproduction project for CVE-2026-16723, a critical RCE in fastjson 1.2.68-1.2.83. Demonstrates AutoType bypass, JNDI injection, and TemplatesImpl in-memory payloads with vulnerable Spring Boot endpoints.
- CVE-2026-16723Exploit
Reproduces fastjson 1.2.83 @JSONType RCE with a vulnerable Spring Boot target and ASM-based payload generator using HTTP or file protocol jar chains.
Responsible use
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