# h2o (PyPI) vulnerabilities Source: https://junglewise.ai/threats/technologies/h2o Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/h2o.json License: CC BY 4.0 with a link back 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. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 18 (6 critical, 0 exploited in the wild) ## 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 processing](https://junglewise.ai/threats/cve-2026-55213-h2o-stack-overflow-in-qpack-http-3-processing) (high, CVSS 7.5, published 10 Jul 2026) - [CVE-2024-8616: PYSEC-2026-1441 - H2O Vulnerable to Arbitrary File Overwrite](https://junglewise.ai/threats/cve-2024-8616-h2o-vulnerable-to-arbitrary-file-overwrite) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-8062: PYSEC-2026-1438 - H2O Vulnerable to Denial of Service (DoS) via `HEAD` Request](https://junglewise.ai/threats/cve-2024-8062-h2o-vulnerable-to-denial-of-service-dos-via-head-request) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-7768: PYSEC-2026-1443 - H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint](https://junglewise.ai/threats/cve-2024-7768-h2o-vulnerable-to-denial-of-service-dos-via-3-importfiles-endpoint) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-7765: PYSEC-2026-1439 - H2O Vulnerable to Denial of Service (DoS) via Large GZIP Parsing](https://junglewise.ai/threats/cve-2024-7765-h2o-vulnerable-to-denial-of-service-dos-via-large-gzip-parsing) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-6863: PYSEC-2026-1442 - H2O Vulnerable to Execution of Arbitrary Files](https://junglewise.ai/threats/cve-2024-6863-h2o-vulnerable-to-execution-of-arbitrary-files) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-6854: PYSEC-2026-1436 - H2O Vulnerable to Arbitrary File Overwrite via File Export](https://junglewise.ai/threats/cve-2024-6854-h2o-vulnerable-to-arbitrary-file-overwrite-via-file-export) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-10572: PYSEC-2026-1444 - H2O Vulnerable to Denial of Service (DoS) and File Write](https://junglewise.ai/threats/cve-2024-10572-h2o-vulnerable-to-denial-of-service-dos-and-file-write) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-10550: PYSEC-2026-1440 - H2O Vulnerable to Denial of Service (DoS) via `/3/ParseSetup` Endpoint](https://junglewise.ai/threats/cve-2024-10550-h2o-vulnerable-to-denial-of-service-dos-via-3-parsesetup-endpoint) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-10549: PYSEC-2026-1445 - H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint](https://junglewise.ai/threats/cve-2024-10549-h2o-vulnerable-to-denial-of-service-dos-via-3-parse-endpoint) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-5979: PYSEC-2026-1437 - h2o vulnerable to unexpected POST request shutting down server](https://junglewise.ai/threats/cve-2024-5979-h2o-vulnerable-to-unexpected-post-request-shutting-down-server) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-5550: PYSEC-2026-1446 - Arbitrary system path lookup in h20](https://junglewise.ai/threats/cve-2024-5550-arbitrary-system-path-lookup-in-h20) (low, CVSS 3, published 7 Jul 2026) - [CVE-2026-3960: H2O.ai H2O-3 remote code execution in ImportSQLTable API](https://junglewise.ai/threats/cve-2026-3960-h2o-ai-h2o-3-remote-code-execution-in-importsqltable-api) (critical, CVSS 9.8, published 23 Apr 2026) - [CVE-2024-5986: H2O has an External Control of File Name or Path vulnerability](https://junglewise.ai/threats/cve-2024-5986-h2o-has-an-external-control-of-file-name-or-path-vulnerability) (critical, CVSS 9.1, published 2 Feb 2026) - [CVE-2025-6544: H2O affected by a deserialization vulnerability](https://junglewise.ai/threats/cve-2025-6544-h2o-affected-by-a-deserialization-vulnerability) (critical, CVSS 9.8, published 22 Sep 2025) - [CVE-2024-10553: H2O Deserialization of Untrusted Data Vulnerability](https://junglewise.ai/threats/cve-2024-10553-h2o-deserialization-of-untrusted-data-vulnerability) (critical, CVSS 9.8, published 20 Mar 2025) - [CVE-2024-45758: H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URL](https://junglewise.ai/threats/cve-2024-45758-h2o-ai-h2o-vulnerable-to-deserialization-attacks-via-a-jdbc) (critical, CVSS 9.1, published 6 Sep 2024) - [CVE-2023-6569: h2oai h2o-3 arbitrary file overwrite via path traversal](https://junglewise.ai/threats/cve-2023-6569-h2oai-h2o-3-arbitrary-file-overwrite-via-path-traversal) (critical, CVSS 9.3, published 14 Dec 2023) ## Most severe h2o (PyPI) vulnerabilities - [CVE-2024-10553: H2O Deserialization of Untrusted Data Vulnerability](https://junglewise.ai/threats/cve-2024-10553-h2o-deserialization-of-untrusted-data-vulnerability) (critical, CVSS 9.8, published 20 Mar 2025) - [CVE-2026-3960: H2O.ai H2O-3 remote code execution in ImportSQLTable API](https://junglewise.ai/threats/cve-2026-3960-h2o-ai-h2o-3-remote-code-execution-in-importsqltable-api) (critical, CVSS 9.8, published 23 Apr 2026) - [CVE-2025-6544: H2O affected by a deserialization vulnerability](https://junglewise.ai/threats/cve-2025-6544-h2o-affected-by-a-deserialization-vulnerability) (critical, CVSS 9.8, published 22 Sep 2025) - [CVE-2023-6569: h2oai h2o-3 arbitrary file overwrite via path traversal](https://junglewise.ai/threats/cve-2023-6569-h2oai-h2o-3-arbitrary-file-overwrite-via-path-traversal) (critical, CVSS 9.3, published 14 Dec 2023) - [CVE-2024-45758: H2O.ai H2O vulnerable to deserialization attacks via a JDBC Connection URL](https://junglewise.ai/threats/cve-2024-45758-h2o-ai-h2o-vulnerable-to-deserialization-attacks-via-a-jdbc) (critical, CVSS 9.1, published 6 Sep 2024) - [CVE-2024-5986: H2O has an External Control of File Name or Path vulnerability](https://junglewise.ai/threats/cve-2024-5986-h2o-has-an-external-control-of-file-name-or-path-vulnerability) (critical, CVSS 9.1, published 2 Feb 2026) - [CVE-2026-55213: h2o stack overflow in QPACK HTTP/3 processing](https://junglewise.ai/threats/cve-2026-55213-h2o-stack-overflow-in-qpack-http-3-processing) (high, CVSS 7.5, published 10 Jul 2026) - [CVE-2024-5550: PYSEC-2026-1446 - Arbitrary system path lookup in h20](https://junglewise.ai/threats/cve-2024-5550-arbitrary-system-path-lookup-in-h20) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-5979: PYSEC-2026-1437 - h2o vulnerable to unexpected POST request shutting down server](https://junglewise.ai/threats/cve-2024-5979-h2o-vulnerable-to-unexpected-post-request-shutting-down-server) (low, CVSS 3, published 7 Jul 2026) - [CVE-2024-7768: PYSEC-2026-1443 - H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint](https://junglewise.ai/threats/cve-2024-7768-h2o-vulnerable-to-denial-of-service-dos-via-3-importfiles-endpoint) (low, CVSS 3, published 7 Jul 2026) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other PyPI technologies - [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities - [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities - [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities - [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities - [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities - [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities - [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities - [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities - [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities - [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities - [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities - [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "h2o (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/h2o, 13 November 2026.