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CVE-2026-77414— JSONata: Arbitrary Code Execution via crafted JSONata expressions

Quick assessment

Affected
jsonata-js jsonata
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

jsonata-js JSONata是jsonata-js组织的一款JSON查询与转换的表达式引擎。 jsonata-js JSONata 1.8.8之前版本和2.2.1之前版本存在代码注入漏洞，该漏洞源于src/jsonata.js的environment.lookup函数使用了可绕过的hasOwnProperty检查，可能导致精心构造的表达式利用原型链访问以主机进程权限执行任意代码。

CVSS 9.3 · Critical EPSS 0.57% · P46

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
jsonata-js jsonata < 1.8.8 affected
>= 2.0.0, < 2.2.1 affected
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I. Basic Information for CVE-2026-77414

Vulnerability Information
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Vulnerability Title
JSONata: Arbitrary Code Execution via crafted JSONata expressions
Source: CVE Program / CVE List V5
Vulnerability Description
JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, the src/jsonata.js environment.lookup function used a bypassable hasOwnProperty check. Crafted expressions could use $hasOwnProperty, $spread, $string, prototype access, and $constructor to reach the object prototype and invoke process.getBuiltinModule with child_process, executing arbitrary code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
jsonata-js JSONata 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jsonata-js JSONata是jsonata-js组织的一款JSON查询与转换的表达式引擎。 jsonata-js JSONata 1.8.8之前版本和2.2.1之前版本存在代码注入漏洞，该漏洞源于src/jsonata.js的environment.lookup函数使用了可绕过的hasOwnProperty检查，可能导致精心构造的表达式利用原型链访问以主机进程权限执行任意代码。
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

Vendor Product Affected Versions CPE Subscribe
jsonata-js jsonata < 1.8.8 -

II. Public POCs for CVE-2026-77414

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: RCE via CVE-2026-77414 confirmed - /flag.txt exfiltrated through child_process: PROOF_ef790e69dab86509
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 7728 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-77414

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Patches & Fixes for CVE-2026-77414 (3)

Vendor Advisories for CVE-2026-77414 (1)

Vendor Pages for CVE-2026-77414 (1)

Same Patch Batch · jsonata-js · 2026-08-21 · 3 CVEs total

CVE-2026-77413 9.3 CRITICAL JSONata: Arbitrary Code Execution via crafted JSONata expressions
CVE-2026-77415 9.3 CRITICAL JSONata: Arbitrary Code Execution via crafted JSONata expressions

IV. Related Vulnerabilities

Same product: jsonata
Same vendor: jsonata-js
Same weakness: CWE-94

V. Comments for CVE-2026-77414

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