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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 是一种用于 JSON 查询和转换的语言。在版本 1.8.8 和 2.2.1 之前，src/jsonata.js 中的 函数使用的 检查可以被绕过。攻击者可以构造特定的表达式，利用 、 、 、原型访问（prototype access）以及 等手段访问对象原型，并调用 加载 模块，从而以主机进程的权限执行任意代码。该问题已在版本 1.8.8 和 2.2.1 中得到修复。

CVSS 9.3 · Critical EPSS 0.35% · P27

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

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
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Qwen3.6-35B-A3B · 7728 chars
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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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