Malicious Code Detected in markdownlint-cli2-action Package
Summary
MAL-2025-191516: Malicious code in markdownlint-cli2-action (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The markdownlint-cli2-action package is an npm action that helps users lint Markdown files in their workflows. It is designed to ensure that Markdown files adhere to specified style guidelines, enhancing readability and consistency. However, this package has been found to contain malicious code, posing a significant security risk to users who integrate it into their projects.
Vulnerability Detail
The vulnerability originates from the discovery of malicious code within the markdownlint-cli2-action package. This code can potentially compromise the integrity of applications that utilize this package, leading to unauthorized access, data breaches, or other malicious activities. The issue was identified by Amazon Inspector, highlighting the importance of scrutinizing dependencies in software projects.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall markdownlint-cli2-actionIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, you may consider removing the markdownlint-cli2-action package from your project until a secure version is available. This can be done by executing the command: 'npm uninstall markdownlint-cli2-action'.
Conclusion
The markdownlint-cli2-action package has been found to contain malicious code, posing a serious risk to users. It is essential to update or remove the package to safeguard your applications. Regular monitoring of dependencies using tools like Vulert can help maintain security in your projects.
See every vulnerability recorded for markdownlint-cli2-action →
FAQ
markdownlint-cli2-action is an npm action used to lint Markdown files in CI/CD workflows, ensuring they follow specific style guidelines.
The malicious code was identified by Amazon Inspector, which conducts security assessments on open-source packages.
Using the compromised package can lead to security vulnerabilities, including unauthorized access to sensitive data and potential exploitation by attackers.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without any signup.
If you cannot update the package right away, consider removing it from your project as a temporary measure until a secure version is released.
