Remote Deserialization in h2o-3 importBinaryModel (JAR Handler)
CVE-2026-8751 Published on May 17, 2026
h2oai h2o-3 JAR Model.java importBinaryModel deserialization
A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Timeline
Advisory disclosed
VulDB entry created
VulDB entry last update
Weakness Types
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-8751 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-8751
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