GitHub Advisoryadvisory · Maven, PyPI

GHSA-wj3h-wx8g-x699 H2O has an External Control of File Name or Path vulnerability

CRITICAL Published 2026-02-02 Modified 2026-10-27 Official page ↗
Aliases
CVE-2024-5986
Ecosystem
Maven, PyPI
Packages
ai.h2o:h2o-core, h2o
Severity
Critical
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weaknesses
CWE-73
Reviewed
2026-02-02

Affected packages

• Maven ai.h2o:h2o-core: <= 3.46.0.1 (no fix yet) • PyPI h2o: <= 3.46.0.1 (no fix yet)

Description

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.

Related

Alias · CVE (1)

  • CVE-2024-5986 A vulnerability in h2oai/h2o-3 version 3.46.0.1 allows remote attackers to write arbitrary data to any file on the server. vulnerability

Weakness · CWE (1)

  • CWE-73 External Control of File Name or Path weakness

References