PYSEC-2026-1440
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/h2o/PYSEC-2026-1440.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-1440
- Aliases
- Published
- 2026-07-07T14:34:51Z
- Modified
- 2026-07-07T17:46:12Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- H2O Vulnerable to Denial of Service (DoS) via `/3/ParseSetup` Endpoint
- Details
-
A vulnerability in the
/3/ParseSetupendpoint 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. - References
-
- https://nvd.nist.gov/vuln/detail/CVE-2024-10550
- https://github.com/h2oai/h2o-3
- https://github.com/h2oai/h2o-3/blob/51c25940ded8b7d0acc8f3f72329fd9dedbb3a34/h2o-core/src/main/java/water/api/ParseSetupHandler.java#L121
- https://huntr.com/bounties/ef3f4d89-3b8b-4618-b134-cb93c1664ec6
- https://pypi.org/project/h2o
- https://github.com/advisories/GHSA-7qq7-pvm9-x8rf
Affected packages
PyPI / h2o
Package
- Name
- h2o
- View open source insights on deps.dev
- Purl
- pkg:pypi/h2o
Affected versions
3.*
3.30.0.7
3.30.1.1
3.30.1.2
3.30.1.3
3.32.0.2
3.32.0.3
3.32.0.4
3.32.0.5
3.32.1.1
3.32.1.2
3.32.1.3
3.32.1.4
3.32.1.5
3.32.1.6
3.32.1.7
3.34.0.3
3.34.0.7
3.34.0.8
3.36.0.2
3.36.0.3
3.36.0.4
3.36.1.1
3.36.1.2
3.36.1.3
3.36.1.4
3.36.1.5
3.38.0.1
3.38.0.2
3.38.0.3
3.38.0.4
3.40.0.1
3.40.0.2
3.40.0.3
3.40.0.4
3.42.0.1
3.42.0.2
3.42.0.3
3.42.0.4
3.44.0.1
3.44.0.2
3.44.0.3
3.46.0.1