External Control of File Name or Path in h2oai/h2o-3
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | h2o | < 3.46.0.1 | 3.46.0.1 |
References
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H- Weakness (CWE)
CWE-610, CWE-73- Platform
- Python (PyPI)
- Package
h2o- Disclosed
- 14.12.2023
- Updated
- 11.10.2026 12:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gqrq-j6pm-98c2 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-350 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: h2o
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 17
- First → latest
- 12.2023 04.2026
- Without a fix
- 14
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 9
- Medium 2
Disclosures per year
- 2023: 1
- 2024: 3
- 2025: 11
- 2026: 2
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External Control of File Name or Path in h2oai/h2o-3 this entry
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