CVE-2026-6621— 1024bit extend-deep index.js prototype pollution
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I. Basic Information for CVE-2026-6621
Vulnerability Information
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Vulnerability Title
1024bit extend-deep index.js prototype pollution
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was determined in 1024bit extend-deep up to 0.1.6. The impacted element is an unknown function of the file index.js. This manipulation of the argument __proto__ causes improperly controlled modification of object prototype attributes. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The code repository of the project has not been active for many years.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
extend-deep 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
extend-deep是杭盖个人开发者的一个深度递归合并对象的JavaScript工具库。 extend-deep 0.1.6及之前版本存在安全漏洞，该漏洞源于对文件index.js中参数__proto__的操作不当，可能导致对象原型属性被不当修改。
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 |
|---|---|---|---|---|
| 1024bit | extend-deep | 0.1.0 | - |
II. Public POCs for CVE-2026-6621
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-1321
- CVE-2026-42264
Axios: Prototype pollution read-side gadgets in HTTP adapter - CVE-2026-42232
n8n: XML Node Prototype Pollution to RCE - CVE-2026-42231
n8n: Prototype Pollution in XML Webhook Body Parser Leads to - CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbo - CVE-2026-42033
Axios: Prototype Pollution Gadgets - Response Tampering, Dat
V. Comments for CVE-2026-6621
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