CVE-2026-27727: mchange-commons-java Remote Code Execution Vulnerability
Summary
CVE-2026-27727: mchange-commons-java: Remote Code Execution via JNDI Reference Resolution. Affects com.mchange:mchange-commons-java versions < 0.4.0. Fixed in 0.4.0. How to fix ↓
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Background
mchange-commons-java is a Java library that provides various utilities for managing database connections, including the popular c3p0 connection pooling library. It offers features such as connection pooling, statement caching, and transaction management. However, it has a vulnerability related to its implementation of Java Naming and Directory Interface (JNDI) functionality, which can lead to remote code execution if exploited.
Vulnerability Detail
The vulnerability arises from mchange-commons-java's support for remote factoryClassLocation values in JNDI references. An attacker can craft a malicious jaxax.naming.Reference or serialized object that, when read by an application using this library, can trigger the download and execution of arbitrary code. This issue is particularly concerning because it bypasses the security measures implemented in the JDK, as mchange-commons-java has its own JNDI dereferencing mechanism that is not subject to the same restrictions.
How To Fix
Minimum fixed version
0.4.0
This is the first release that contains the fix.
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Workaround
There are no viable workarounds for this vulnerability other than upgrading to the patched version. Users should avoid using earlier versions of mchange-commons-java in their application CLASSPATH.
Conclusion
The mchange-commons-java library has a critical vulnerability that allows for remote code execution through JNDI reference resolution. Users are strongly advised to upgrade to version 0.4.0 or later to mitigate this risk. Regular monitoring and updates are essential to maintain application security.
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FAQ
The CVSS score of this vulnerability is 8.9, indicating a high severity level.
Any application that uses mchange-commons-java versions prior to 0.4.0 is at risk of this vulnerability.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application using the Vulert playground without any signup.
If exploited, this vulnerability can allow an attacker to execute arbitrary code on the server, potentially leading to data breaches or complete system compromise.
No, the only effective mitigation is to upgrade to version 0.4.0 or later, as there are no workarounds available.
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