---
id: CVE-2024-7768
aliases:
  - GHSA-p2vc-m5fv-9w9m
  - PYSEC-2026-1443
title: H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint
summary: H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: h2o
product: h2o
ecosystem: pip
affected:
  - h2o <= 3.46.1
  - 'ai.h2o:h2o-core <= 3.46.1'
published: '2025-03-20'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:48.504834427Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-p2vc-m5fv-9w9m'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-7768'
  - url: 'https://github.com/h2oai/h2o-3'
  - url: >-
      https://github.com/h2oai/h2o-3/blob/7d418fa19d3ab434f742818e37f891bef9102c97/h2o-core/src/main/java/water/api/ImportFilesHandler.java#L19
  - url: 'https://huntr.com/bounties/3fe640df-bef4-4072-8890-0d12bc2818f6'
tags:
  - osv
  - pip
epss: 0.00772
epssPercentile: 0.54227
ingestedAt: '2026-07-08T18:25:51.490Z'
---

## Overview

A vulnerability in the `/3/ImportFiles` endpoint of h2oai/h2o-3 version 3.46.1 allows an attacker to cause a denial of service. The endpoint takes a single GET parameter, `path`, which can be recursively set to reference itself. This leads the server to repeatedly call its own endpoint, eventually filling up the request queue and leaving the server unable to handle other requests.

## Affected packages

- `h2o <= 3.46.1`
- `ai.h2o:h2o-core <= 3.46.1`

## Remediation

Refer to the advisory for the patched release.