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CVE-2026-12208— jsonata-js jsonata Function Binding Frame System jsonata.js createFrame prototype pollution

Quick assessment

Affected
jsonata-js jsonata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

jsonata是jsonata-js组织的一个JSON查询和转换表达式语言。 jsonata-js jsonata 2.2.0及之前版本存在安全漏洞，该漏洞源于Function Binding Frame System组件的src/jsonata.js文件中的createFrame函数对对象原型属性修改控制不当，可能导致远程攻击。

CVSS 5.3 · Medium EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
jsonata-js jsonata 2.0 affected
2.1 affected
2.2.0 affected
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I. Basic Information for CVE-2026-12208

Vulnerability Information
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Vulnerability Title
jsonata-js jsonata Function Binding Frame System jsonata.js createFrame prototype pollution
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in jsonata-js jsonata up to 2.2.0. The affected element is the function createFrame of the file src/jsonata.js of the component Function Binding Frame System. This manipulation causes improperly controlled modification of object prototype attributes. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
jsonata-js jsonata 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jsonata是jsonata-js组织的一个JSON查询和转换表达式语言。 jsonata-js jsonata 2.2.0及之前版本存在安全漏洞，该漏洞源于Function Binding Frame System组件的src/jsonata.js文件中的createFrame函数对对象原型属性修改控制不当，可能导致远程攻击。
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 2.0 cpe:2.3:a:jsonata-js:jsonata:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12208

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III. Intelligence Information for CVE-2026-12208

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Proof of Concept for CVE-2026-12208 (1)

IV. Related Vulnerabilities

Same product: jsonata
Same vendor: jsonata-js
Same weakness: CWE-1321

V. Comments for CVE-2026-12208

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