Deserialization of Untrusted Data Affecting org.springframework.statemachine:spring-statemachine-core package, versions [,4.0.2)
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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- published28 Jul 2026
- disclosed11 Jun 2026
- creditUnknown
Introduced: 11 Jun 2026
CVE-2026-41862 (opens in a new tab)How to fix?
Upgrade org.springframework.statemachine:spring-statemachine-core to version 4.0.2 or higher.
Overview
org.springframework.statemachine:spring-statemachine-core is a
Affected versions of this package are vulnerable to Deserialization of Untrusted Data.
The Kryo-based persistence serializers (KryoStateMachineSerialisationService / AbstractKryoStateMachineSerialisationService) deserialise persisted state-machine contexts without enabling Kryo.setRegistrationRequired(true) or enforcing a class allowlist. This affects every persistence backend that round-trips the StateMachineContext through Kryo, namely the JPA, MongoDB, Redis and ZooKeeper persisters. An attacker who can write to or tamper with the persisted context store can supply a serialized payload referencing arbitrary classes, triggering a deserialization gadget chain that results in remote code execution inside the application JVM.
Note:
Exploitation requires the attacker to be able to control or modify the contents of the persistence store (database, Redis, MongoDB or ZooKeeper node) from which contexts are loaded.