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CVE-2026-16723— Remote Code Execution in fastjson 1.2.68–1.2.83

CVSS 9.0 · Critical EPSS 0.41% · P34

Affected Version Matrix 1

VendorProductVersion RangeStatus
AlibabaFastjson1.2.68≤ 1.2.83affected
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I. Basic Information for CVE-2026-16723

Vulnerability Information
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Vulnerability Title
Remote Code Execution in fastjson 1.2.68–1.2.83
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Alibaba FASTJSON 2 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Alibaba Fastjson是中国Alibaba公司开源的一款基于Java的快速JSON解析器/生成器。 Alibaba FASTJSON 2 1.2.68版本至1.2.83版本存在安全漏洞，该漏洞源于输入验证错误和反序列化注入问题，在默认配置下无需启用AutoType或classpath gadget即可被利用，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
AlibabaFastjson 1.2.68 ~ 1.2.83 -

II. Public POCs for CVE-2026-16723

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9736 chars
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III. Intelligence Information for CVE-2026-16723

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Vendor Advisories for CVE-2026-16723 (1)

IV. Related Vulnerabilities

Same product: Fastjson
Same vendor: Alibaba
Same weakness: CWE-20

V. Comments for CVE-2026-16723

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