{"id":"CVE-2023-6569","aliases":["GHSA-gqrq-j6pm-98c2","PYSEC-2026-350"],"title":"External Control of File Name or Path in h2oai/h2o-3","summary":"External Control of File Name or Path in h2oai/h2o-3","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H","vendor":"h2o","product":"h2o","ecosystem":"pip","affected":["h2o < 3.46.0.1"],"patched":["h2o 3.46.0.1"],"published":"2023-12-14","updated":"2026-10-27","sourceUpdated":"2026-10-27T16:45:04.545213111Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-gqrq-j6pm-98c2","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6569"},{"url":"https://github.com/h2oai/h2o-3/commit/e8884f5187eb81311877c5f0dd4d6d9c70f33d78"},{"url":"https://github.com/h2oai/h2o-3"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/h2o/PYSEC-2026-350.yaml"},{"url":"https://huntr.com/bounties/a5d003dc-c23e-4c98-8dcf-35ba9252fa3c"},{"url":"https://pypi.org/project/h2o"},{"url":"https://github.com/advisories/GHSA-gqrq-j6pm-98c2"}],"tags":["osv","pip","ghsa"],"epss":0.00721,"epssPercentile":0.53758,"cwe":["CWE-73","CWE-610"],"ingestedAt":"2026-10-27T17:33:23.779Z","slug":"CVE-2023-6569","body":"## Overview\n\nRemote 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.\n\n## Affected packages\n\n- `h2o < 3.46.0.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `h2o 3.46.0.1`","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}