Critical Malicious Code Vulnerability in remark-gfm-v4 Package
Summary
MAL-2026-737: Malicious code in remark-gfm-v4 (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The remark-gfm-v4 package is a popular npm module used for parsing and rendering GitHub Flavored Markdown (GFM) in JavaScript applications. It allows developers to easily integrate markdown support into their projects, enhancing content formatting and presentation. However, this package has been found to contain malicious code, posing significant security risks to any application that utilizes it.
Vulnerability Detail
The vulnerability originates from the inclusion of malicious code within the remark-gfm-v4 package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information, such as secrets and keys. The malicious nature of the code is classified under CWE-506, indicating that it embeds harmful functionality within the software. Users are advised to treat any system running this package as fully compromised.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall remark-gfm-v4If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a temporary workaround, you can avoid using the remark-gfm-v4 package and look for alternative libraries that provide similar functionality without the associated risks. Additionally, ensure that your application is monitored for vulnerabilities using tools like Vulert, which can alert you in real-time for open-source vulnerabilities in your software.
Conclusion
The discovery of malicious code in the remark-gfm-v4 package poses a serious threat to applications using this npm module. It is crucial for developers to take immediate action by removing the package and monitoring their systems for any signs of compromise. Utilizing tools like Vulert can aid in maintaining the security of your software.
See every vulnerability recorded for remark-gfm-v4 →
FAQ
The malicious code can lead to unauthorized access to sensitive information and full control of the affected computer.
You can use the Vulert playground at Vulert Scanner to check if your application is affected without requiring any signup.
You should immediately uninstall the package and rotate any secrets or keys stored on the affected system.
Currently, there is no information about a patched version. It is advisable to remove the package entirely.
Vulert uses the package-lock.json file to monitor and alert in real-time for open-source vulnerabilities in your software.
