{"id":"CVE-2024-10553","aliases":["GHSA-h7xg-cmpp-48hf","PYSEC-2026-351"],"title":"H2O Deserialization of Untrusted Data Vulnerability","summary":"H2O Deserialization of Untrusted Data Vulnerability","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"h2o","product":"h2o","ecosystem":"pip","affected":["h2o < 3.46.0.6","ai.h2o:h2o-core < 3.46.0.6"],"patched":["h2o 3.46.0.6","ai.h2o:h2o-core 3.46.0.6"],"published":"2025-03-20","updated":"2026-10-27","sourceUpdated":"2026-10-27T16:45:03.583847985Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-h7xg-cmpp-48hf","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-10553"},{"url":"https://github.com/h2oai/h2o-3/commit/ac1d642b4d86f10a02d75974055baf2a4b2025ac"},{"url":"https://github.com/h2oai/h2o-3"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/h2o/PYSEC-2026-351.yaml"},{"url":"https://huntr.com/bounties/e6f550dd-eda2-428c-a740-ed8f893a084b"},{"url":"https://pypi.org/project/h2o"},{"url":"https://github.com/advisories/GHSA-h7xg-cmpp-48hf"}],"tags":["osv","pip","ghsa"],"epss":0.01587,"epssPercentile":0.75468,"cwe":["CWE-502"],"ingestedAt":"2026-10-27T17:33:23.778Z","slug":"CVE-2024-10553","body":"## Overview\n\nA vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are passed to DriverManager.getConnection, leading to deserialization if a MySQL or PostgreSQL driver is available in the classpath. This issue is fixed in version 3.46.0.6.\n\n## Affected packages\n\n- `h2o < 3.46.0.6`\n- `ai.h2o:h2o-core < 3.46.0.6`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `h2o 3.46.0.6`\n- `ai.h2o:h2o-core 3.46.0.6`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}