CVE-2024-5986

Remote Arbitrary File Write with Arbitrary Data in h2oai/h2o-3

Published Feb 2, 2026 CVSS 3.0 · 9.1 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-wj3h-wx8g-x699 H2O has an External Control of File Name or Path vulnerability
History
Type Values Removed Values Added
First Time appeared H2oai
H2oai h2o-3
Vendors & Products H2oai
H2oai h2o-3
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Remote Arbitrary File Write with Arbitrary Data in h2oai/h2o-3
Weaknesses CWE-73
References
Metrics cvssV3_0

{'score': 9.1, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
@huntr_ai
Published
Updated
Feb 2, 2026, 1:13 PM
Reserved
Jun 13, 2024, 6:37 PM
Status
Deferred
Published
Feb 2, 2026, 11:16 AM
Modified
Jun 17, 2026, 8:17 AM