{"id":"GHSA-gqrq-j6pm-98c2","aliases":["CVE-2023-6569","PYSEC-2026-350"],"title":"External Control of File Name or Path in h2oai/h2o-3","description":"Remote unauthenticated attackers can overwrite arbitrary server files with attacker-controllable data. The data that the attacker can control is not entirely arbitrary. h2o writes a CSV/XLS/etc file to disk, so the attacker data is wrapped in quotations and starts with \"C1\", if they're exporting as CSV.","severity":"critical","score":9.3,"published":"2023-12-14T15:30:22.000Z","modified":"2026-10-27T16:45:04.545Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"PyPI","name":"h2o","ranges":[{"events":[{"introduced":"0"},{"fixed":"3.46.0.1"}],"type":"ECOSYSTEM"}],"versions":["3.10.0.10","3.10.0.3","3.10.0.6","3.10.0.7","3.10.0.8","3.10.3.3","3.10.3.4","3.10.4.1","3.10.4.2","3.10.4.3","3.10.4.4","3.10.4.6","3.10.4.8","3.16.0.1","3.16.0.2","3.16.0.3","3.16.0.4","3.18.0.1","3.18.0.10","3.18.0.11","3.18.0.2","3.18.0.3","3.18.0.4","3.18.0.5","3.18.0.6","3.18.0.7","3.18.0.8","3.18.0.9","3.20.0.4","3.20.0.5","3.20.0.6","3.20.0.7","3.20.0.8","3.22.0.1","3.22.0.2","3.22.0.3","3.22.0.4","3.22.0.5","3.22.1.1","3.22.1.2","3.22.1.3","3.22.1.4","3.22.1.5","3.22.1.6","3.24.0.1","3.24.0.2","3.24.0.3","3.24.0.4","3.24.0.5","3.26.0.1","3.26.0.10","3.26.0.11","3.26.0.2","3.26.0.3","3.26.0.4","3.26.0.5","3.26.0.6","3.26.0.8","3.26.0.9","3.28.0.1","3.28.0.2","3.28.0.3","3.28.1.2","3.28.1.3","3.30.0.1","3.30.0.2","3.30.0.3","3.30.0.4","3.30.0.5","3.30.0.6","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"],"fixed":["3.46.0.1"]}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2023-6569","https://github.com/h2oai/h2o-3/commit/e8884f5187eb81311877c5f0dd4d6d9c70f33d78","https://github.com/h2oai/h2o-3","https://github.com/pypa/advisory-database/tree/main/vulns/h2o/PYSEC-2026-350.yaml","https://huntr.com/bounties/a5d003dc-c23e-4c98-8dcf-35ba9252fa3c","https://pypi.org/project/h2o"],"sources":[{"name":"OSV","id":"GHSA-gqrq-j6pm-98c2","modified":"2026-10-27T16:45:04.545213111Z","url":"https://osv.dev/vulnerability/GHSA-gqrq-j6pm-98c2"}],"assessments":[{"source":"OSV","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H","score":9.3}]}