---
title: "CVE-2024-45758: H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URL"
url: https://erroneo.us/security/cve/CVE-2024-45758/
description: "CVE-2024-45758 (ai.h2o:h2o-core (Maven)): H2O.ai H2O through 3.46.0.4 allows attackers to arbitrarily set the JDBC URL, leading to deserialization attacks…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-09-06
date_modified: 2025-09-23
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-45758"
kev: false
cvss: 9.1
epss: 0.00906
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-45758: H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URL

**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 0.9% , percentile 59: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 59% 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 ai.h2o:h2o-core (Maven) <= 3.46.0.7, no fixed version listed ; h2o (PyPI) <= 3.46.0.7, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

H2O.ai H2O through 3.46.0.4 allows attackers to arbitrarily set the JDBC URL, leading to deserialization attacks, file reads, and command execution. Exploitation can occur when an attacker has access to post to the ImportSQLTable URI with a JSON document containing a connectionurl property with any typical JDBC Connection URL attack payload such as one that uses queryInterceptors.

## Affected packages

- Maven `ai.h2o:h2o-core` <= 3.46.0.7 → fixed: none listed
- PyPI `h2o` <= 3.46.0.7 → fixed: none listed

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## 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): 0.91% probability of exploitation activity in the next 30 days; percentile 59.

## Sources

- [GitHub Advisory GHSA-hrmc-jmp7-mpm2](https://github.com/advisories/GHSA-hrmc-jmp7-mpm2)
- [CVE.org record CVE-2024-45758](https://www.cve.org/CVERecord?id=CVE-2024-45758)
- [NVD entry CVE-2024-45758](https://nvd.nist.gov/vuln/detail/CVE-2024-45758)
- [spear-shield.notion.site](https://spear-shield.notion.site/Unauthenticated-Remote-Code-Execution-via-Unrestricted-JDBC-Connection-87a958a4874044199cbb86422d1f6068)
- [gist.github.com](https://gist.github.com/AfterSnows/c24ca3c26dc89ab797e610e92a6a9acb)
- [github.com](https://github.com/h2oai/h2o-3/issues/16425)
- [github.com](https://github.com/h2oai/h2o-3/issues/16622)
- [github.com](https://github.com/h2oai/h2o-3/pull/16624)
- [github.com](https://github.com/h2oai/h2o-3/commit/f714edd6b8429c7a7211b779b6ec108a95b7382d)

---
Source page: https://erroneo.us/security/cve/CVE-2024-45758/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt