Deserialization of Untrusted Data Affecting org.apache.camel:camel-netty-http package, versions [,4.14.8)[4.15.0,4.18.3)[4.19.0,4.20.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-40859 (opens in a new tab)How to fix?
Upgrade org.apache.camel:camel-netty-http to version 4.14.8, 4.18.3, 4.20.0 or higher.
Overview
org.apache.camel:camel-netty-http is a versatile open-source integration framework based on known Enterprise Integration Patterns.
Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the ObjectInputFilter (VertxHttpHelper.deserializeJavaObjectFromStream and NettyHttpHelper.deserializeJavaObjectFromStream). An attacker can achieve remote code execution on a Camel application host by causing the producer to process a backend HTTP response with Content-Type: application/x-java-serialized-object when transferException=true or allowJavaSerializedObject=true and throwExceptionOnFailure remains enabled. The vulnerable code reads the response body through a raw ObjectInputStream without any class filtering, so a malicious or compromised backend, or a man-in-the-middle on plain HTTP, can supply a crafted serialized object. If a suitable gadget chain is present on the classpath, the application deserializes attacker-controlled data and executes attacker-chosen code.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.