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CVE-2026-16266

Quick assessment

Affected
n/a mongo-object
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.

Long Shot Labs mongo-object是Long Shot Labs组织的一个使MongoDB数据操作对象化的软件。 Long Shot Labs mongo-object 3.0.3之前版本存在输入验证错误漏洞，该漏洞源于util.js中的expandKey()函数存在原型污染，攻击者可通过提供包含特殊键（如__proto__）的特制属性路径修改JavaScript原型链。

CVSS 4.0 · Medium EPSS 0.42% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a mongo-object < 3.0.3 affected
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I. Basic Information for CVE-2026-16266

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js. An attacker can modify the JavaScript prototype chain by supplying a crafted property path containing special keys such as __proto__.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
Long Shot Labs mongo-object 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Long Shot Labs mongo-object是Long Shot Labs组织的一个使MongoDB数据操作对象化的软件。 Long Shot Labs mongo-object 3.0.3之前版本存在输入验证错误漏洞，该漏洞源于util.js中的expandKey()函数存在原型污染，攻击者可通过提供包含特殊键（如__proto__）的特制属性路径修改JavaScript原型链。
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
- mongo-object 0 ~ 3.0.3 -

II. Public POCs for CVE-2026-16266

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III. Intelligence Information for CVE-2026-16266

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Patches & Fixes for CVE-2026-16266 (1)

Vendor Advisories for CVE-2026-16266 (1)

Proof of Concept for CVE-2026-16266 (2)

Same Patch Batch · n/a · 2026-07-21 · 18 CVEs total

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CVE-2026-52476 AIFlowy 安全漏洞
CVE-2026-52469 Streamax Crocus 安全漏洞
CVE-2026-50758 DayuanJiang next-ai-draw-io 安全漏洞
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CVE-2026-50756 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2026-50757 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2026-50755 DayuanJiang next-ai-draw-io 安全漏洞
CVE-2025-68640 Apple Find My backend service 安全漏洞
CVE-2025-66390 Microsoft Azure API Management 安全漏洞

IV. Related Vulnerabilities

Same vendor: n/a
Same weakness: CWE-1321

V. Comments for CVE-2026-16266

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