Critical Malicious Code Vulnerability in buffer-xoz Package

buffer-xoz Updated 02 Oct 2025

Summary

14/08/2025
CRITICAL
No i
Critical
Not published

MAL-2025-16302: Malicious code in buffer-xoz (npm). Affected versions are not published. No fix is published. How to fix ↓

Free scan

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.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats
SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml
Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile
Javascript package-lock.json · yarn.lock · pnpm-lock.yaml
PHP composer.lock
Python poetry.lock · requirements.txt · Pipfile.lock
Go go.mod
Rust Cargo.lock
Ruby Gemfile.lock
Dart pubspec.lock
C/C++ conan.lock
Elixir mix.lock
Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Sponsored Devnack Your last release was probably never penetration tested Manual testing by engineers who build software, not an auditor's checklist. Trusted by teams at Swift and Google Talk to Devnack

Background

The buffer-xoz package is an npm library designed for handling buffer operations in JavaScript applications. It provides functionalities for manipulating binary data, making it a useful tool for developers working with data streams or binary file formats. However, this package has been identified to contain malicious code, posing significant risks to applications that utilize it.

Vulnerability Detail

The vulnerability in the buffer-xoz package stems from the inclusion of malicious code that can compromise the security of applications using this library. This code can lead to unauthorized access, data breaches, or other malicious activities. The issue was introduced in version 0 and affects all subsequent versions, making it critical for developers to address this vulnerability promptly.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall buffer-xoz

If 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 buffer-xoz package and implement your own buffer handling logic or utilize other well-established libraries that do not have known vulnerabilities.

Conclusion

The buffer-xoz package has been identified as containing malicious code, posing a significant risk to applications that utilize it. Developers are urged to uninstall the package and seek secure alternatives to protect their applications from potential threats.

See every vulnerability recorded for buffer-xoz →

Share this vulnerability

FAQ

The buffer-xoz package is an npm library for handling buffer operations in JavaScript applications.

The malicious code can lead to unauthorized access and data breaches, compromising the security of applications.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without needing to sign up.

You should uninstall the buffer-xoz package immediately and consider using a secure alternative.

No, there is no patch available for buffer-xoz. The recommended action is to remove the package entirely.

Related vulnerabilities

Recent vulnerabilities recorded for buffer-xoz.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall buffer-xoz

If 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 →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →
Help improve this record
Report an issue or send feedback