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GHSA-5w3j-gwgh-4rfv

H2O affected by a deserialization vulnerability

Source: GitHub Advisory Database (reviewed) Critical CVE-2025-6544

Packages

EcosystemPackageAffectedFixed in
Maven ai.h2o:h2o-core <= 3.46.0.7 no fix listed
PyPI h2o <= 3.46.0.7 no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

A deserialization vulnerability exists in h2oai/h2o-3 versions <= 3.46.0.7, allowing attackers to read arbitrary system files and execute arbitrary code. The vulnerability arises from improper handling of JDBC connection parameters, which can be exploited by bypassing regular expression checks and using double URL encoding. This issue impacts all users of the affected versions.

References

External links from the advisory. They lead to third-party sites.