AI and data stack advisories

Severe, 6 weeks1498Projects326

1498 severe, 6 weeks · 326 projects

H2O-3GHSA-5c8j-g96x-cj78

H2O Vulnerable to Denial of Service (DoS) via `HEAD` Request

H2O-3

CVE-2024-8062 · Published Mar 20, 2025 · updated Jul 7, 2026

High7.5
No fix yet
GitHub advisory

A vulnerability in the typeahead endpoint of h2oai/h2o-3 version 3.46.0 allows for a denial of service. The endpoint performs a HEAD request to verify the existence of a specified resource without setting a timeout. An attacker can exploit this by sending multiple requests to an attacker-controlled server that hangs, causing the application to block and become unresponsive to other requests.

Affected versions

PackageAffectedFixed in
h2o
PyPI
>= 3.2.0.1, <= 3.46.0No fix yet
Details and references
CVSS 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity from
GitHub (reviewed advisory)
Weakness
CWE-1088
Also known as
CVE-2024-8062, PYSEC-2026-1438

More H2O-3 advisories

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