H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint
A vulnerability in the /3/ImportFiles endpoint of h2oai/h2o-3 version 3.46.1 allows an attacker to cause a denial of service. The endpoint takes a single GET parameter, path, which can be recursively set to reference itself. This leads the server to repeatedly call its own endpoint, eventually filling up the request queue and leaving the server unable to handle other requests.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | ai.h2o:h2o-core | <= 3.46.1 | no fix |
| Python (PyPI) | h2o | <= 3.46.1 | no fix |
References
- https://nvd.nist.gov/vuln/detail/CVE-2024-7768
- https://github.com/h2oai/h2o-3
- https://github.com/h2oai/h2o-3/blob/7d418fa19d3ab434f742818e37f891bef9102c97/h2o-core/src/main/java/water/api/ImportFilesHandler.java#L19
- https://huntr.com/bounties/3fe640df-bef4-4072-8890-0d12bc2818f6
- https://pypi.org/project/h2o
- https://github.com/advisories/GHSA-p2vc-m5fv-9w9m
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400, CWE-770- Platform
- Java / Kotlin (Maven), Python (PyPI)
- Package
ai.h2o:h2o-core, h2o- Disclosed
- 20.03.2025
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1443 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-p2vc-m5fv-9w9m - 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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H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint this entry
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