Vulnerability · Published Sep 2, 2025 · Assigned by @huntr_ai

CVE-2025-5662Deserialization Vulnerability in h2oai/h2o-3

Critical 9.8

In plain English

A critical-severity unsafe deserialization in h2oai/h2o-3 from h2oai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.0)9.8Critical

Exploit odds (30 days)0.7%top 46.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
h2oai	h2oai/h2o-3	unspecified – before 3.46.0.8

Weakness: CWE-502 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

In plain English

Official description

Affected products (as reported)

References