Technology · PyPI
h2o (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 18 vulnerabilities in h2o (PyPI): 0 in the last 7 days and 0 in the last 90 days, 6 of them critical and 0 exploited in the wild. The most recent, CVE-2026-55213, was published on 10 July 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 6
- Exploited in the wild
- 0
About h2o (PyPI)
Open-source machine learning platform for distributed data analysis and modeling.
Latest h2o (PyPI) vulnerabilities
- CVE-2026-55213: h2o stack overflow in QPACK HTTP/3 processinghighCVSS 7.5
- CVE-2024-8616: PYSEC-2026-1441 - H2O Vulnerable to Arbitrary File OverwritelowCVSS 3EPSS 0.5%
- CVE-2024-8062: PYSEC-2026-1438 - H2O Vulnerable to Denial of Service (DoS) via `HEAD` RequestlowCVSS 3EPSS 0.5%
- CVE-2024-7768: PYSEC-2026-1443 - H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` EndpointlowCVSS 3EPSS 0.8%
- CVE-2024-7765: PYSEC-2026-1439 - H2O Vulnerable to Denial of Service (DoS) via Large GZIP ParsinglowCVSS 3EPSS 0.8%
- CVE-2024-6863: PYSEC-2026-1442 - H2O Vulnerable to Execution of Arbitrary FileslowCVSS 3EPSS 0.4%
- CVE-2024-6854: PYSEC-2026-1436 - H2O Vulnerable to Arbitrary File Overwrite via File ExportlowCVSS 3EPSS 0.8%
- CVE-2024-10572: PYSEC-2026-1444 - H2O Vulnerable to Denial of Service (DoS) and File WritelowCVSS 3EPSS 0.7%
- CVE-2024-10550: PYSEC-2026-1440 - H2O Vulnerable to Denial of Service (DoS) via `/3/ParseSetup` EndpointlowCVSS 3EPSS 0.6%
- CVE-2024-10549: PYSEC-2026-1445 - H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` EndpointlowCVSS 3EPSS 0.6%
- CVE-2024-5979: PYSEC-2026-1437 - h2o vulnerable to unexpected POST request shutting down serverlowCVSS 3EPSS 0.8%
- CVE-2024-5550: PYSEC-2026-1446 - Arbitrary system path lookup in h20lowCVSS 3EPSS 0.8%
- CVE-2026-3960: H2O.ai H2O-3 remote code execution in ImportSQLTable APIcriticalCVSS 9.8EPSS 1.0%
- CVE-2024-5986: H2O has an External Control of File Name or Path vulnerabilitycriticalCVSS 9.1EPSS 0.7%
- CVE-2025-6544: H2O affected by a deserialization vulnerabilitycriticalCVSS 9.8EPSS 0.9%
- CVE-2024-10553: H2O Deserialization of Untrusted Data VulnerabilitycriticalCVSS 9.8EPSS 1.6%
- CVE-2024-45758: H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URLcriticalCVSS 9.1EPSS 0.9%
- CVE-2023-6569: h2oai h2o-3 arbitrary file overwrite via path traversalcriticalCVSS 9.3EPSS 0.7%
Most severe h2o (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2024-10553: H2O Deserialization of Untrusted Data VulnerabilitycriticalCVSS 9.8EPSS 1.6%
- CVE-2026-3960: H2O.ai H2O-3 remote code execution in ImportSQLTable APIcriticalCVSS 9.8EPSS 1.0%
- CVE-2025-6544: H2O affected by a deserialization vulnerabilitycriticalCVSS 9.8EPSS 0.9%
- CVE-2023-6569: h2oai h2o-3 arbitrary file overwrite via path traversalcriticalCVSS 9.3EPSS 0.7%
- CVE-2024-45758: H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URLcriticalCVSS 9.1EPSS 0.9%
- CVE-2024-5986: H2O has an External Control of File Name or Path vulnerabilitycriticalCVSS 9.1EPSS 0.7%
- CVE-2026-55213: h2o stack overflow in QPACK HTTP/3 processinghighCVSS 7.5
- CVE-2024-5550: PYSEC-2026-1446 - Arbitrary system path lookup in h20lowCVSS 3EPSS 0.8%
- CVE-2024-5979: PYSEC-2026-1437 - h2o vulnerable to unexpected POST request shutting down serverlowCVSS 3EPSS 0.8%
- CVE-2024-7768: PYSEC-2026-1443 - H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` EndpointlowCVSS 3EPSS 0.8%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many h2o (PyPI) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/h2o)<a href="https://junglewise.ai/threats/technologies/h2o"><img src="https://junglewise.ai/threats/technologies/h2o/badge.svg" alt="h2o (PyPI) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/h2o.json, and this page as text at https://junglewise.ai/threats/technologies/h2o.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "h2o (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/h2o, 13 November 2026.