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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| h2o(PyPI) | 3.30.0.7 | N/A | N/A |
| ai.h2o:h2o-core(Maven) | 3.30.0.7 | N/A | N/A |
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