CVE-2020-7788: Prototype Pollution in ini Package

ini Updated 02 Oct 2025

Summary

10/12/2020
Yes i
High
7.3

Your scan reports ini 1.3.5. Fixed in 1.3.6.

CVE-2020-7788: ini before 1.3.6 vulnerable to Prototype Pollution via ini.parse. Affects ini versions < 1.3.6. Fixed in 1.3.6. How to fix ↓

Also tracked for

The same CVE-2020-7788 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.

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Background

The ini package is an npm package that provides functionality for parsing and manipulating INI files. INI files are commonly used for configuration purposes in various applications. The package allows developers to read and write INI files in a structured manner. However, versions of the ini package before 1.3.6 are vulnerable to Prototype Pollution.

Vulnerability Detail

The Prototype Pollution vulnerability in the ini package arises when an attacker submits a malicious INI file to an application that uses the ini.parse function to parse the file. By exploiting this vulnerability, the attacker can pollute the prototype of the application, potentially leading to further exploitation depending on the context. This vulnerability has a CVSS score of 7.3, indicating a high severity.

How To Fix

Latest published version: 7.0.0 as of 22 Oct 2026

npm install ini@7.0.0

Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.

If you need the minimum change

1.3.6

This is the first release that contains the fix.

npm install ini@1.3.6

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

Workaround

There is no known workaround for this vulnerability. It is crucial to update to the patched version of the ini package to ensure the security of the application.

Conclusion

The Prototype Pollution vulnerability in the ini package can have severe consequences if left unaddressed. It is essential for developers to update to version 1.3.6 or later to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.

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FAQ

Prototype Pollution is a vulnerability that occurs when an attacker can modify the prototype of an object, leading to unexpected behavior and potential security issues.

By submitting a specially crafted INI file to an application that uses the ini.parse function, an attacker can pollute the prototype of the application and potentially exploit it further.

The impact of this vulnerability depends on the context of the application. However, it can lead to unauthorized access, data manipulation, or remote code execution.

Yes, the vulnerability has been patched in version 1.3.6 of the ini package. It is crucial to update to this version or later to mitigate the risk.

You can use the Vulert Playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply upload your package-lock.json file and the tool will provide real-time monitoring and alerts for open-source vulnerabilities.

How To Fix

Latest published version: 7.0.0 as of 22 Oct 2026

npm install ini@7.0.0

Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.

If you need the minimum change

1.3.6

This is the first release that contains the fix.

npm install ini@1.3.6

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

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