Critical severity · published Sep 2, 2025
CVE-2025-5662
Deserialization Vulnerability in h2oai/h2o-3
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
A deserialization vulnerability exists in the H2O-3 REST API (POST /99/ImportSQLTable) that affects all versions up to 3.46.0.7. This vulnerability allows remote code execution (RCE) due to improper validation of JDBC connection parameters when using a Key-Value format. The vulnerability is present in the MySQL JDBC Driver version 8.0.19 and JDK version 8u112. The issue is resolved in version 3.46.0.8.
CVSS vector
CVSS:3.0/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)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
H2
h2oai/h2o-3 · h2oai
before 3.46.0.8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-5662
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-5662
github.com
https://github.com/h2oai/h2o-3/commit/f714edd6b8429c7a7211b779b6ec108a95b7382d
huntr.com
https://huntr.com/bounties/057a743b-b2ec-4312-8262-ce0ff8bc161c
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