Cloudanix VulnDB

CVE-2024-5986

Critical · 9.1

CVSS

9.1

EPSS

0.7%

Published

Feb 2, 2026

CISA due date

—

The record

A vulnerability in h2oai/h2o-3 version 3.46.0.1 allows remote attackers to write arbitrary data to any file on the server. This is achieved by exploiting the `/3/Parse` endpoint to inject attacker-controlled data as the header of an empty file, which is then exported using the `/3/Frames/framename/export` endpoint. The impact of this vulnerability includes the potential for remote code execution and complete access to the system running h2o-3, as attackers can overwrite critical files such as private SSH keys or script files.

Affected packages

Ecosystem Package Introduced Fixed
Maven ai.h2o:h2o-core 0 No fix
PyPI h2o 0 No fix

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