---
title: "CVE-2024-10553: H2O Deserialization of Untrusted Data Vulnerability"
url: https://erroneo.us/security/cve/CVE-2024-10553/
description: "CVE-2024-10553 (h2o (PyPI)): A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-03-20
date_modified: 2025-03-20
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-10553"
kev: false
cvss: 9.8
epss: 0.01587
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.6% , percentile 75: FIRST’s model estimates a 1.6% chance of exploitation activity in the next 30 days, higher than 75% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes h2o (PyPI) < 3.46.0.6, fixed in 3.46.0.6 ; ai.h2o:h2o-core (Maven) < 3.46.0.6, fixed in 3.46.0.6 . Check your lockfile, including transitive dependencies.

## What it is

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 3.47.0.

## Affected packages

- PyPI `h2o` < 3.46.0.6 → fixed: 3.46.0.6
- Maven `ai.h2o:h2o-core` < 3.46.0.6 → fixed: 3.46.0.6

## Affected products (CVE record)

- h2oai h2oai/h2o-3: unspecified < 3.47.0

## Severity

- @huntr_ai CVSS 3.0: 9.8 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.59% probability of exploitation activity in the next 30 days; percentile 75.

## Sources

- [GitHub Advisory GHSA-h7xg-cmpp-48hf](https://github.com/advisories/GHSA-h7xg-cmpp-48hf)
- [CVE.org record CVE-2024-10553](https://www.cve.org/CVERecord?id=CVE-2024-10553)
- [NVD entry CVE-2024-10553](https://nvd.nist.gov/vuln/detail/CVE-2024-10553)
- [huntr.com](https://huntr.com/bounties/e6f550dd-eda2-428c-a740-ed8f893a084b)
- [github.com](https://github.com/h2oai/h2o-3/commit/ac1d642b4d86f10a02d75974055baf2a4b2025ac)

---
Source page: https://erroneo.us/security/cve/CVE-2024-10553/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt