H2O vulnerable to Deserialization of Untrusted Data
The H2O machine learning platform uses "Iced" classes as the primary means of moving Java Objects around the cluster. The Iced format supports inclusion of serialized Java objects. When a model is deserialized, any class is allowed to be deserialized (no class whitelist). An attacker can construct a crafted Iced model that uses Java gadgets and leads to arbitrary code execution when imported to the H2O platform.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | ai.h2o:h2o-core | <= 3.46.0.4 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-502- Platform
- Java / Kotlin (Maven)
- Package
ai.h2o:h2o-core- Disclosed
- 21.07.2024
- Updated
- 11.10.2026 12:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-w36w-948j-xhfw - CC BY 4.0
Vulnerability history: ai.h2o:h2o-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 15
- First → latest
- 11.2023 04.2026
- Without a fix
- 13
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 8
- Medium 1
Disclosures per year
- 2023: 1
- 2024: 2
- 2025: 10
- 2026: 2
-
H2O vulnerable to Deserialization of Untrusted Data this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.