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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.
Reserved 2024-10-30 | Published 2025-03-20 | Updated 2025-03-20 | Assigner @huntr_aiCWE-1333 Inefficient Regular Expression Complexity
huntr.com/bounties/ef3f4d89-3b8b-4618-b134-cb93c1664ec6
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