CVE-2024-8062: Denial of Service in h2oai/h2o-3

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-20 · updated 2026-06-17
Weakness: CWE-1088

Description

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 products

h2oai/h2o-3: 3.46.0

References

https://huntr.com/bounties/a04190d9-4acb-449a-9a7f-f1bf6be1ed23
https://huntr.com/bounties/a04190d9-4acb-449a-9a7f-f1bf6be1ed23

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