CVE-2026-8751: h2oai h2o-3 JAR Model.java importBinaryModel deserialization

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-17 · updated 2026-10-14
Weakness: CWE-20

Description

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.

Affected products

h2oai/h2o-3: through 7402

References

https://vuldb.com/submit/810107
https://vuldb.com/vuln/364378
https://vuldb.com/vuln/364378/cti
https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS

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