{"id":"CVE-2016-4864","details":"H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.","modified":"2026-08-07T14:31:42.644037Z","published":"2017-05-12T18:29:00.437Z","references":[{"type":"ADVISORY","url":"https://jvn.jp/en/jp/JVN94779084/index.html"},{"type":"FIX","url":"https://github.com/h2o/h2o/issues/1077"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/h2o/h2o","events":[{"introduced":"788d3dcf683f65acc43a0dd81a75d697574b7656"},{"last_affected":"469cc4b3741f4d156cc9495d892861a6cb298777"},{"introduced":"f0f401faca3594c036503e613f3979101f3fd7f9"},{"last_affected":"94a68eb27af6f69b8ea0e849fb8fc7d2554646da"}],"database_specific":{"extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.0.3"},{"introduced":"2.1.0"},{"last_affected":"2.1.0"},{"introduced":"2.1.0-beta1"},{"last_affected":"2.1.0-beta1"}],"source":["CPE_RANGE","CPE_STRING"],"cpe":["cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*","cpe:2.3:a:dena:h2o:2.1.0:*:*:*:*:*:*:*","cpe:2.3:a:dena:h2o:2.1.0:beta1:*:*:*:*:*:*"]}}],"versions":["2.1.0","2.1.0-beta1","v2.0.3","v2.0.2","v2.0.1","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4864.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}