CVE-2024-10550: h2o

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability in the `/3/ParseSetup` endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service (DoS) attack. The endpoint applies a user-specified regular expression to a user-controllable string. This can be exploited by an attacker to cause inefficient regular expression complexity, leading to the exhaustion of server resources and making the server unresponsive.

Affected products

• h2o h2o: version 3.46.0.1 only

Published 2025-03-20. Last modified 2026-06-17.