{"id":"CVE-2024-5986","aliases":["GHSA-wj3h-wx8g-x699","PYSEC-2026-353"],"title":"H2O has an External Control of File Name or Path vulnerability","summary":"H2O has an External Control of File Name or Path vulnerability","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","vendor":"h2o","product":"ai.h2o:h2o-core","ecosystem":"maven","affected":["ai.h2o:h2o-core <= 3.46.0.1","h2o <= 3.46.0.1"],"published":"2026-02-02","updated":"2026-10-27","sourceUpdated":"2026-10-27T16:45:03.593504579Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-wj3h-wx8g-x699","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-5986"},{"url":"https://github.com/h2oai/h2o-3"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/h2o/PYSEC-2026-353.yaml"},{"url":"https://huntr.com/bounties/64ff5319-6ac3-4447-87f7-b53495d4d5a3"},{"url":"https://pypi.org/project/h2o"},{"url":"https://github.com/advisories/GHSA-wj3h-wx8g-x699"}],"tags":["osv","maven","ghsa"],"epss":0.00714,"epssPercentile":0.53519,"cwe":["CWE-73"],"ingestedAt":"2026-10-27T16:32:34.331Z","slug":"CVE-2024-5986","body":"## Overview\n\nA vulnerability in h2oai/h2o-3 version 3.46.0.1 allows remote attackers to write arbitrary data to any file on the server. This is achieved by exploiting the `/3/Parse` endpoint to inject attacker-controlled data as the header of an empty file, which is then exported using the `/3/Frames/framename/export` endpoint. The impact of this vulnerability includes the potential for remote code execution and complete access to the system running h2o-3, as attackers can overwrite critical files such as private SSH keys or script files.\n\n## Affected packages\n\n- `ai.h2o:h2o-core <= 3.46.0.1`\n- `h2o <= 3.46.0.1`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}