Security Update: assertj-core Vulnerability Leading to Information Disclosure and Denial of Service
Summary
ALSA-2026:59372: Moderate: assertj-core security update. Affects assertj-core versions < 3.24.2-9.el10_2.1. Fixed in 3.24.2-9.el10_2.1. How to fix ↓
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Background
assertj-core is a popular Java library that provides a rich and intuitive set of strongly-typed assertions for unit testing, compatible with both JUnit and TestNG. It enhances the testing experience by allowing developers to write clear and expressive assertions, thus improving code quality and maintainability. However, recent findings have revealed a vulnerability in assertj-core that could potentially expose sensitive information and lead to denial of service attacks.
Vulnerability Detail
The vulnerability identified as CVE-2026-24400 pertains to an XML External Entity (XXE) issue within the assertj-core library. This security flaw allows attackers to exploit the XML parsing capabilities of the library, leading to information disclosure where sensitive data may be leaked. Additionally, it poses a risk of denial of service, where the application could become unresponsive due to maliciously crafted XML input. The root cause of this vulnerability lies in the improper handling of XML input, which can be exploited if the application processes untrusted XML data.
How To Fix
Minimum fixed version
3.24.2-9.el10_2.1
This is the first release that contains the fix.
sudo dnf update assertj-coreTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, a temporary workaround is to avoid processing untrusted XML data within your application. Ensure that any XML input is sanitized and validated before parsing to mitigate the risk of exploitation.
Conclusion
The assertj-core library has a critical vulnerability that could lead to information disclosure and denial of service. It is crucial for developers to update to the latest patched version to safeguard their applications. Additionally, employing best practices for XML data handling can further mitigate risks.
See every vulnerability recorded for assertj-core →
FAQ
CVE-2026-24400 is a security vulnerability in the assertj-core library that allows for information disclosure and denial of service via XML External Entity (XXE) attacks.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By utilizing the Vulert playground, you can check if your application is affected by this vulnerability without any signup.
The risks include potential exposure of sensitive information and the possibility of denial of service, where the application may become unresponsive due to malicious XML input.
You can update the assertj-core package by running the command 'sudo dnf update assertj-core' in your terminal to install the patched version.
Yes, you can mitigate the risk by avoiding the processing of untrusted XML data and ensuring that any XML input is properly sanitized and validated.
Related vulnerabilities
Recent vulnerabilities recorded for assertj-core.
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