Deserialization in H2o
CVE-2026-8751
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.008 (53.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.008 · change: +0.004
Affected products
- H2o
- H2oai H2o-3 — versions 7402
Weakness classification (CWE)
References
- vuldb.com/submit/810107 (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/vuln/364378 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/364378/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vulnplus-note.wetolink.com/share/b5nsQg6EcsBS (exploit, Broken Link)
Frequently asked questions
- What is CVE-2026-8751?
- CVE-2026-8751 is a high-severity vulnerability in H2o, classified under Improper Input Validation. CVSS score: 7.3/10. Published 2026-05-17.
- How severe is CVE-2026-8751?
- High severity. CVSS v3 base score is 7.3 out of 10.