H2O-3GHSA-7qq7-pvm9-x8rf
H2O Vulnerable to Denial of Service (DoS) via `/3/ParseSetup` Endpoint
High7.5CVE-2024-10550 · Published Mar 20, 2025 · updated Jul 7, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| h2o PyPI | >= 3.30.0.7, <= 3.46.0.1 | No fix yet |
Details and references
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.
- CVSS 3.0
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-1333
- Also known as
- CVE-2024-10550, PYSEC-2026-1440
More H2O-3 advisories
All H2O-3| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Mar 202025 | H2O Deserialization of Untrusted Data Vulnerability CVE-2024-10553Critical9.8fixed in 3.46.0.6 | Critical9.8 | 3.46.0.6 |
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) and File Write CVE-2024-10572High7.5no fix yet | High7.5 | No fix yet |
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint CVE-2024-10549High7.5no fix yet | High7.5 | No fix yet |
| Mar 202025 | H2O Vulnerable to Arbitrary File Overwrite via File Export CVE-2024-6854High7.1no fix yet | High7.1 | No fix yet |
| Mar 202025 | H2O Vulnerable to Execution of Arbitrary Files CVE-2024-6863Medium6.5no fix yet | Medium6.5 | No fix yet |
| Mar 202025 | H2O Vulnerable to Denial of Service (DoS) via Large GZIP Parsing CVE-2024-7765High7.5no fix yet | High7.5 | No fix yet |