Critical Git Vulnerability CVE-2025-48385: Protecting Your Windows Environment

A critical protocol injection vulnerability, identified as CVE-2025-48385, has been discovered in the widely-used Git version control system. This flaw poses a significant security risk, potentially allowing for arbitrary code execution on affected systems. This article provides a comprehensive overview of the vulnerability and detailed steps for protecting your Windows environment, including systems with Git for Windows and Visual Studio.

Understanding the Threat: Git Protocol Injection

At its core, CVE-2025-48385 is a protocol injection vulnerability that arises during the git clone process when utilizing a feature known as "bundle URIs." These bundles are essentially pre-packaged Git repository data that can be hosted on content delivery networks (CDNs) to speed up the cloning process. The vulnerability stems from the Git client's failure to sufficiently validate the information about these bundles provided by a remote server.

An attacker can exploit this flaw by setting up a malicious Git repository that advertises a specially crafted bundle URI. When a user attempts to clone this repository, the vulnerable Git client can be tricked into writing the fetched bundle to an attacker-controlled location on the local filesystem. Since the content of this bundle is also under the attacker's control, this can ultimately lead to arbitrary code execution on the user's machine.

The vulnerability has been rated as "critical," with a CVSS 4.0 base score of 8.6 (High), highlighting the seriousness of the potential impact.

Impact on the Windows Ecosystem: Git for Windows and Visual Studio

This vulnerability has significant implications for developers and organizations operating within the Windows ecosystem.

Git for Windows: Any standalone installation of Git for Windows is susceptible to this vulnerability. Developers using the command line or any other tools that leverage the underlying Git installation are at risk when cloning repositories from untrusted sources.

Visual Studio: Microsoft has confirmed that this vulnerability affects Visual Studio, as it includes a Git component. An attacker could exploit this by luring a developer using Visual Studio to clone a malicious repository. Recognizing the severity of this issue, Microsoft has released security updates for various versions of Visual Studio to address CVE-2025-48385.

How to Protect Your Windows Environment: A Step-by-Step Guide

Immediate action is recommended to mitigate the risks associated with CVE-2025-48385. Follow these steps to secure your Windows systems.

Step 1: Check Your Git Version

The first step is to determine if your current Git installation is vulnerable. Open a Command Prompt, PowerShell, or Git Bash terminal and execute the following command: