CVE-2024-5986 – Remote Arbitrary File Write with Arbitrary Data in h2oai/h2o-3

CVE ID : CVE-2024-5986

Published : Feb. 2, 2026, 10:36 a.m. | 39 minutes ago

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.

Severity: 0.0 | NA

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