CVE-2026-55153 mchange-commons-java contains elements susceptible to abuse via JNDI injection and "deserialization gadgets"
Attackers can exploit unsafe JNDI object construction and deserialization gadgets in mchange-commons-java to execute arbitrary code or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55153?
CVE-2026-55153 is a high-severity unsafe deserialization vulnerability in swaldman mchange-commons-java, published on 1 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
mchange-commons-java is a Java library of shared utility classes used by mchange projects like the c3p0 connection pool. Prior to version 0.6.0, its JNDI ObjectFactory implementation (com.mchange.v2.naming.JavaBeanObjectFactory) will construct objects of arbitrary classes and initialize "JavaBean"-style properties, which for certain classes enables JNDI injection and "deserialization gadgets." Such initialization is unsafe for some classes: for example, setting the contentType property of a Swing JEditorPane to text/html and its text property to HTML containing a stylesheet <link> will provoke an HTTP GET on an arbitrary URL, potentially from within a trusted security domain. The problem is aggravated by the library's ReferenceIndirector, through which malicious JNDI Reference objects can be smuggled in for dereferencing wherever an application reads a Java-serialized object. This has been resolved in version 0.6.0.
Which versions are affected by CVE-2026-55153?
2 open source packages ship an affected version, including com.mchange:mchange-commons-java.
| Package | Affected | Fixed in |
|---|---|---|
com.mchange:mchange-commons-java Maven | All versions | 0.6.0 |
com.mchange:mchange-commons-java Maven | All versions | 0.6.0 |
How do I fix CVE-2026-55153?
Upgrade com.mchange:mchange-commons-java to 0.6.0 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-55153 being exploited?
There is no known exploitation of CVE-2026-55153 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-XR11055, CLSA-2026-1786542819, CLSA-2026-1786594683, CLSA-2026-1788238245, ECHO-de0f-2160-8020, GHSA-h84g-69h7-mw6v and 1 more.