Description
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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| h2oai | h2oai/h2o-3 | unspecified – ≤ latest | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | ai.h2o:h2o-core | >= 3.30.0.7, <= 3.46.0.1 | — | GHSA-7qq7-pvm9-x8rf |
| PyPI | h2o | >= 3.30.0.7, <= 3.46.0.1 | — | PYSEC-2026-1440 |