CVE-2024-5986 — Remote Arbitrary File Write with Arbitrary Data in h2oai/h2o-3
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…
Published: 2026-02-02 · CVSS: 9.1 · CVSS 3.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7