AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

H2O-3GHSA-gqrq-j6pm-98c2

External Control of File Name or Path in h2oai/h2o-3

H2O-3

CVE-2023-6569 · Published Dec 14, 2023 · updated Oct 27, 2026

Critical9.3
Fix: upgrade to 3.46.0.1 or later
GitHub advisory

Remote unauthenticated attackers can overwrite arbitrary server files with attacker-controllable data. The data that the attacker can control is not entirely arbitrary. h2o writes a CSV/XLS/etc file to disk, so the attacker data is wrapped in quotations and starts with "C1", if they're exporting as CSV.

Affected versions

PackageAffectedFixed in
h2o
PyPI
< 3.46.0.13.46.0.1
Details and references
CVSS 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
Severity from
GitHub (reviewed advisory)
Weakness
CWE-610, CWE-73
Also known as
CVE-2023-6569, PYSEC-2026-350

More H2O-3 advisories

All H2O-3
High 7.5Mar 20, 2025H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` EndpointCVE-2024-10549no fix yetHigh 7.5Mar 20, 2025H2O Vulnerable to Denial of Service (DoS) and File WriteCVE-2024-10572no fix yetCritical 9.8Mar 20, 2025H2O Deserialization of Untrusted Data VulnerabilityCVE-2024-10553fixed in 3.46.0.6Critical 9.1Sep 6, 2024H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URLCVE-2024-45758no fix yetHigh 7.5Jun 27, 2024h2o vulnerable to unexpected POST request shutting down serverCVE-2024-5979no fix yetMedium 5.3Jun 6, 2024Arbitrary system path lookup in h20CVE-2024-5550no fix yet