# CVE-2024-10553: H2O Deserialization of Untrusted Data Vulnerability

Source: https://junglewise.ai/threats/cve-2024-10553-h2o-deserialization-of-untrusted-data-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-03-20  
License: CC BY 4.0 with a link back

CVE-2024-10553 · Severity: critical · CVSS 9.8 · Published 2025-03-20

A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are passed to DriverManager.getConnection, leading to deserialization if a MySQL or PostgreSQL driver is available in the classpath. This issue is fixed in version 3.46.0.6.

Technologies: [ai.h2o:h2o-core (Maven)](https://junglewise.ai/threats/technologies/ai-h2o-h2o-core), [h2o (PyPI)](https://junglewise.ai/threats/technologies/h2o). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2024-10553 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-10553 being exploited in the wild.

**How severe is CVE-2024-10553?** Critical severity, with a CVSS score of 9.8, published 20 March 2025.

**Which products and versions are affected?** ai.h2o:h2o-core (Maven) < 3.46.0.6, ECOSYSTEM:introduced=0,fixed=3.46.0.6; h2o (PyPI) < 3.46.0.6, ECOSYSTEM:introduced=0,fixed=3.46.0.6.

**Is there a fix for CVE-2024-10553?** Yes. ai.h2o:h2o-core (Maven): upgrade to 3.46.0.6 or later; h2o (PyPI): upgrade to 3.46.0.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2024-10553?** Check whether you run ai.h2o:h2o-core (Maven) or h2o (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- ai.h2o:h2o-core (Maven): upgrade to 3.46.0.6 or later

  ```sh
  # set ai.h2o:h2o-core to 3.46.0.6 in your pom.xml or build.gradle
  ```

- h2o (PyPI): upgrade to 3.46.0.6 or later

  ```sh
  pip install "h2o>=3.46.0.6"
  ```


## Affected products

- ai.h2o:h2o-core (Maven) < 3.46.0.6, ECOSYSTEM:introduced=0,fixed=3.46.0.6
- h2o (PyPI) < 3.46.0.6, ECOSYSTEM:introduced=0,fixed=3.46.0.6

## Identifiers

- CVE-2024-10553
- GHSA-h7xg-cmpp-48hf
- PYSEC-2026-351

## Related threats

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- [PYSEC-2026-1438 - H2O Vulnerable to Denial of Service (DoS) via `HEAD` Request](https://junglewise.ai/threats/cve-2024-8062-h2o-vulnerable-to-denial-of-service-dos-via-head-request)
- [PYSEC-2026-1443 - H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint](https://junglewise.ai/threats/cve-2024-7768-h2o-vulnerable-to-denial-of-service-dos-via-3-importfiles-endpoint)
- [PYSEC-2026-1439 - H2O Vulnerable to Denial of Service (DoS) via Large GZIP Parsing](https://junglewise.ai/threats/cve-2024-7765-h2o-vulnerable-to-denial-of-service-dos-via-large-gzip-parsing)
- [PYSEC-2026-1442 - H2O Vulnerable to Execution of Arbitrary Files](https://junglewise.ai/threats/cve-2024-6863-h2o-vulnerable-to-execution-of-arbitrary-files)