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CVE-2026-46509— deepobj: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Quick assessment

Affected
ranfdev deepobj
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.

deepobj是ranfdev个人开发者的一个深度对象操作工具。 deepobj 1.0.3之前版本存在安全漏洞，该漏洞源于属性路径包含__proto__/constructor/prototype时可能发生原型污染。

CVSS 8.2 · High EPSS 0.32% · P24

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
ranfdev deepobj < 1.0.3 affected
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I. Basic Information for CVE-2026-46509

Vulnerability Information
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Vulnerability Title
deepobj: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Source: CVE Program / CVE List V5
Vulnerability Description
deepobj provides get, set, delete deep objects in javascript. Prior to 1.0.3, prototype pollution is possible when property paths contain __proto__/constructor/prototype. The property path must not be exposed as user input. This vulnerability is fixed in 1.0.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
deepobj 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
deepobj是ranfdev个人开发者的一个深度对象操作工具。 deepobj 1.0.3之前版本存在安全漏洞，该漏洞源于属性路径包含__proto__/constructor/prototype时可能发生原型污染。
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
ranfdev deepobj < 1.0.3 -

II. Public POCs for CVE-2026-46509

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8065 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-46509

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Vendor Advisories for CVE-2026-46509 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1321