Babel Compiler Vulnerability

Oct 13, 2025 by wbrum.org 38 views

Introduction

In the ever-evolving landscape of software development, vulnerabilities can pose significant risks to the security and integrity of applications. The detection of CVE-2025-27789 (Medium) in the runtime-7.12.5.tgz package highlights the importance of regular security audits and updates. In this article, we will delve into the details of this vulnerability, its impact, and the suggested fix to ensure the security of your applications.

CVE-2025-27789 - Medium Severity Vulnerability

Vulnerable Library

The vulnerable library in question is the runtime-7.12.5.tgz package, which is a part of the Babel compiler. Babel is a popular tool for writing next-generation JavaScript, and its modular runtime helpers are used extensively in various applications.

Library Home Page

The library's home page can be found at https://registry.npmjs.org/@babel/runtime/-/runtime-7.12.5.tgz. This page provides detailed information about the library, including its dependencies, version history, and documentation.

Dependency Hierarchy

The dependency hierarchy of the vulnerable library is as follows:

styles-4.10.0.tgz (Root Library)
- runtime-7.12.5.tgz (Vulnerable Library)

Found in Base Branch

The vulnerability was found in the main branch of the repository.

Vulnerability Details

Babel Compiler Vulnerability

The Babel compiler is vulnerable to a quadratic complexity issue when compiling regular expression named capturing groups. This issue arises when using versions of Babel prior to 7.26.10 and 8.0.0-alpha.17. The generated code is vulnerable if all the following conditions are true:

Using Babel to compile regular expression named capturing groups
Using the .replace method on a regular expression that contains named capturing groups
Using untrusted strings as the second argument of .replace

Impact

This vulnerability can lead to a denial-of-service (DoS) attack, where an attacker can cause the application to consume excessive resources, leading to a crash or slowdown.

Publish Date and URL

The vulnerability was published on 2025-03-11, and the URL for more information is https://www.mend.io/vulnerability-database/CVE-2025-27789.

CVSS 3 Score Details

Base Score Metrics

The CVSS 3 score for this vulnerability is 6.2, with the following base score metrics:

Exploitability Metrics:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High

CVSS 3 Score Calculator

For more information on CVSS 3 scores, please visit https://www.first.org/cvss/calculator/3.0.

Suggested Fix

Type: Upgrade Version

The suggested fix for this vulnerability is to upgrade the version of the runtime package to 7.26.10 or later.

Origin

The origin of this fix is https://github.com/advisories/GHSA-968p-4wvh-cqc8.

Release Date and Fix Resolution

The release date of this fix is 2025-03-11, and the fix resolution is 7.26.10.

Conclusion

Introduction

In our previous article, we delved into the details of CVE-2025-27789 (Medium) detected in the runtime-7.12.5.tgz package. In this article, we will provide a comprehensive Q&A section to address any questions or concerns you may have regarding this vulnerability.

Q&A

Q: What is CVE-2025-27789 (Medium)?

A: CVE-2025-27789 (Medium) is a vulnerability detected in the runtime-7.12.5.tgz package, which is a part of the Babel compiler. This vulnerability can lead to a denial-of-service (DoS) attack, where an attacker can cause the application to consume excessive resources, leading to a crash or slowdown.

Q: What is the impact of this vulnerability?

A: The impact of this vulnerability is a denial-of-service (DoS) attack, where an attacker can cause the application to consume excessive resources, leading to a crash or slowdown.

Q: What are the conditions that must be true for this vulnerability to occur?

A: The conditions that must be true for this vulnerability to occur are:

Using Babel to compile regular expression named capturing groups
Using the .replace method on a regular expression that contains named capturing groups
Using untrusted strings as the second argument of .replace

Q: How can I determine if my application is affected by this vulnerability?

A: To determine if your application is affected by this vulnerability, you can check the version of the runtime package in your application. If you are using version 7.12.5 or earlier, you are likely affected by this vulnerability.

Q: What is the suggested fix for this vulnerability?

A: The suggested fix for this vulnerability is to upgrade the version of the runtime package to 7.26.10 or later.

Q: Where can I find more information about this vulnerability?

A: You can find more information about this vulnerability on the following websites:

Q: How can I prevent similar vulnerabilities in the future?

A: To prevent similar vulnerabilities in the future, you can:

Regularly update your dependencies to the latest versions
Use a vulnerability scanner to identify potential vulnerabilities
Implement a secure coding practice to prevent vulnerabilities

Q: What is the CVSS 3 score for this vulnerability?

A: The CVSS 3 score for this vulnerability is 6.2, with the following base score metrics:

Exploitability Metrics:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High

Q: Where can I find more information about CVSS 3 scores?

A: You can find more information about CVSS 3 scores on the following website:

https://www.first.org/cvss/calculator/3.0

Conclusion

In conclusion, CVE-2025-27789 (Medium) detected in the runtime-7.12.5.tgz package highlights the importance of regular security audits and updates. By understanding the vulnerability, its impact, and the suggested fix, developers can ensure the security and integrity of their applications. We hope this Q&A article has provided you with the information you need to address any questions or concerns you may have regarding this vulnerability.