Vulnerability · Published Jul 23, 2026 · Assigned by alibaba
CVE-2026-16723Remote Code Execution in fastjson 1.2.68–1.2.83
Critical 9.0
In plain English
A critical-severity improper input validation in Fastjson from Alibaba. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)9.0Critical
Exploit odds (30 days)0.7%top 48.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | com.alibaba:fastjson | no fix listed | GHSA-crf3-v9rr-v7hj |
Affected products (as reported)
Weakness: CWE-20, CWE-502 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H