PYSEC-2026-1439
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/h2o/PYSEC-2026-1439.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-1439
- Aliases
- Published
- 2026-07-07T14:34:55.579044Z
- Modified
- 2026-07-07T17:47:39.961712512Z
- 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 Large GZIP Parsing
- Details
-
In h2oai/h2o-3 version 3.46.0.2, a vulnerability exists where uploading and repeatedly parsing a large GZIP file can cause a denial of service. The server becomes unresponsive due to memory exhaustion and a large number of concurrent slow-running jobs. This issue arises from the improper handling of highly compressed data, leading to significant data amplification.
- References
-
- https://nvd.nist.gov/vuln/detail/CVE-2024-7765
- https://github.com/h2oai/h2o-3
- https://github.com/h2oai/h2o-3/blob/7d418fa19d3ab434f742818e37f891bef9102c97/h2o-core/src/main/java/water/parser/ParseDataset.java#L900
- https://huntr.com/bounties/0e58b1a5-bdca-4e60-af92-09de9c76a9ff
- https://pypi.org/project/h2o
- https://github.com/advisories/GHSA-6w62-3jvj-mfj6
Affected packages
PyPI / h2o
Package
- Name
- h2o
- View open source insights on deps.dev
- Purl
- pkg:pypi/h2o
Affected versions
3.*
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
3.46.0.2