Critical severity · published May 17, 2026
CVE-2026-8751
h2oai h2o-3 JAR Model.java importBinaryModel deserialization
9.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
H2
h2o-3 · h2oai
7402 · source: vendor
H2
H2o · H2o
through 7402 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8751
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-8751
Third Party Advisory
https://vuldb.com/submit/810107
Third Party Advisory
https://vuldb.com/vuln/364378
Permissions Required
https://vuldb.com/vuln/364378/cti
Broken Link
https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS
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