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.

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…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.000 (11.7th percentile) — read the EPSS interpretation.

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.

Affected products

H2o
H2oai H2o-3 — versions 7402

Weakness classification (CWE)

References

cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
cna@vuldb.com (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.