{"id":"CVE-2017-10868","aliases":["DEBIAN-CVE-2017-10868","EUVD-2017-2508","GHSA-p9v4-5fvf-9qmw"],"status":"published","title":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server...","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03534,"percentile":0.89344,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2017-12-22T14:00:00Z","modified":"2026-10-20T10:48:07Z","fixes":[{"ecosystem":"Debian:12","package":"h2o","fixed_in":["2.2.3+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"h2o","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3+dfsg-1"}]}]}],"products":[{"vendor":"dena","product":"h2o"},{"vendor":"h2o","product":"h2o"},{"vendor":"kazuho oku","product":"h2o"}],"references":[{"url":"https://github.com/h2o/h2o/issues/1459","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://jvn.jp/en/jp/JVN84182676/index.html","tags":["third-party-advisory","x_refsource_JVN","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-10868"},{"url":"https://github.com/advisories/GHSA-p9v4-5fvf-9qmw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-10868","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2017-10868","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","status":"published","published":"2017-12-22T14:00:00Z","modified":"2024-08-05T17:50:12.72Z","updated_at":"2026-11-02T14:33:13.27226Z"}],"euvd":[{"id":"EUVD-2017-2508","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","status":"published","published":"2017-12-22T14:00:00Z","modified":"2024-08-05T17:50:12Z","updated_at":"2026-11-03T02:23:25.281788Z"}],"ghsa":[{"id":"GHSA-p9v4-5fvf-9qmw","title":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server...","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","status":"published","published":"2022-05-13T01:07:06Z","modified":"2023-02-01T05:03:08Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:50:01.019018Z"}],"nvd":[{"id":"CVE-2017-10868","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","status":"published","published":"2017-12-22T14:29:12.487Z","modified":"2026-06-17T01:00:50.737Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:04:11.215487Z"}],"osv":[{"id":"CVE-2017-10868","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","status":"published","published":"2017-12-22T14:29:12.487Z","modified":"2026-10-20T10:48:07.845046627Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:03.851821Z"},{"id":"DEBIAN-CVE-2017-10868","description":"H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.","status":"published","published":"2017-12-22T14:29:12.487Z","modified":"2026-09-01T20:03:40.952996944Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:28.207321Z"}]}}