CVE-2026-27727: mchange-commons-java Remote Code Execution Vulnerability
HIGHCVE-2026-27727 is a HIGH remote code execution vulnerability (CWE-502: Deserialization of Untrusted Data) affecting mchange-commons-java libraries in the Maven ecosystem. The issue involves remote code execution via jndi reference resolution. Remediation is available by upgrading affected packages to version 0.4.0.
CVE-2026-27727 at a Glance
How to Fix CVE-2026-27727
To remediate this vulnerability, upgrade all affected mchange-commons-java dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>com.mchange</groupId>
<artifactId>mchange-commons-java</artifactId>
<version>0.4.0</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=com.mchangeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-27727, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=com.mchangeAnalyze the terminal output to locate any version of mchange-commons-java in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.4.0), your application is affected.
Note: The mvn dependency:tree -Dincludes=com.mchange command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In mchange-commons-java, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-27727 Affected mchange-commons-java Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
com.mchange:mchange-commons-java
|
Maven |
< 0.4.0
|
0.4.0
|
References
Frequently Asked Questions
What is CVE-2026-27727?
Which mchange-commons-java versions are affected?
What version fixes CVE-2026-27727?
Is mchange-commons-java affected?
What CWE is associated with CVE-2026-27727?
How can I check Maven dependencies for CVE-2026-27727?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-m2cm-222f-qw44",
"modified" : "2026-02-27T20:55:40Z",
"published" : "2026-02-25T18:20:05Z",
"aliases" : [ "CVE-2026-27727" ],
"summary" : "mchange-commons-java: Remote Code Execution via JNDI Reference Resolution",
"details" : "### Impact\nmchange-commons-java includes code that mirrors early implementations of JNDI functionality, including support for remote `factoryClassLocation` values, by which code can be downloaded and invoked within a running application. If an attacker can provoke an application to read a maliciously crafted `jaxax.naming.Reference` or serialized object, they can provoke the download and execution of malicious code.\n\nImplementations of this functionality within the JDK were disabled by default behind a System property that defaults to `false`, `com.sun.jndi.ldap.object.trustURLCodebase`. However, since mchange-commons-java includes an independent implementation of JNDI derefencing, libraries (such as c3p0) that resolve references via that implementation could be provoked to download and execute malicious code even after the JDK was hardened.\n\n### Patches\nMirroring the JDK patch, mchange-commons-java's JNDI functionality is now gated by configuration parameters that default to restrictive values. Those parameters are documented [here](https://www.mchange.com/projects/c3p0/#configuring_security).\n\n### Workarounds\nNo. Users should upgrade to mchange-commons-java >= 0.4.0. Earlier versions should be avoided on application CLASSPATHs.\n\n### References\n\n[c3p0, you little rascal — Hans-Martin Münch](https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal/)\n[c3p0 documentation, security note](https://www.mchange.com/projects/c3p0/#security-note)\n[c3p0 documentation, configuring security](https://www.mchange.com/projects/c3p0/#configuring_security)",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "com.mchange:mchange-commons-java"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.4.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/swaldman/mchange-commons-java/security/advisories/GHSA-m2cm-222f-qw44"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27727"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/swaldman/mchange-commons-java"
}, {
"type" : "WEB",
"url" : "https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal"
}, {
"type" : "WEB",
"url" : "https://www.mchange.com/projects/c3p0/#configuring_security"
}, {
"type" : "WEB",
"url" : "https://www.mchange.com/projects/c3p0/#security-note"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-502", "CWE-74" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-02-25T18:20:05Z",
"nvd_published_at" : "2026-02-25T17:25:39Z"
}
}