Deserialization of Untrusted Data Affecting org.apache.camel:camel-hazelcast package, versions [4.0.0,4.18.5)[4.19.0,4.22.1)
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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- published22 Oct 2026
- disclosed19 Oct 2026
- creditcattier from TCBS, Leon Zlobecki
Introduced: 19 Oct 2026
NewCVE-2026-78162 (opens in a new tab)How to fix?
Upgrade org.apache.camel:camel-hazelcast to version 4.18.5, 4.22.1 or higher.
Overview
Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the Camel-built Hazelcast configurations in HazelcastDefaultComponent#getOrCreateHzClientInstance() and ReplicatedHazelcastAggregationRepository#doStart(). An attacker who can publish to the attached Hazelcast cluster can send a serialized Java object that Hazelcast deserializes, enabling remote code execution; this occurs when Camel builds a client configuration without a referenced ClientConfig or hazelcastConfigUri, or starts the replicated repository without an injected hazelcastInstance. Hazelcast clusters have no authentication or TLS enabled by default.
Workarounds
- Supply an explicit Hazelcast configuration with a
JavaSerializationFilterConfigfor the client, or inject a pre-builtHazelcastInstance, to restrict deserialization of attacker-supplied objects. - Set the JVM-wide filter to
-Djdk.serialFilter=!java.net.;java.;javax.;org.apache.camel.;!*to limit which classes can be deserialized. - Enable Hazelcast cluster authentication and TLS to restrict who can reach and publish to the cluster.
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.