{"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":"2026-04-10T03:50:05.445248Z","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":"0"},{"last_affected":"f0f401faca3594c036503e613f3979101f3fd7f9"},{"introduced":"0"},{"last_affected":"94a68eb27af6f69b8ea0e849fb8fc7d2554646da"}],"database_specific":{"versions":[{"introduced":"2.0.0"},{"last_affected":"2.0.3"},{"introduced":"0"},{"last_affected":"2.1.0"},{"introduced":"0"},{"last_affected":"2.1.0-beta1"}]}}],"versions":["v0.9.1","v0.9.2","v1.0.1","v1.1.0","v1.1.1","v1.2.0","v1.3.0","v1.3.0-beta1","v1.3.1","v1.4.0","v1.4.1","v1.4.2","v1.5.0","v1.5.0-beta1","v1.5.0-beta2","v1.5.0-beta3","v1.5.0-beta4","v1.5.1","v1.5.2","v1.5.3","v1.6.0","v1.6.0-beta1","v1.6.0-beta2","v1.7.0","v1.7.0-beta1","v1.7.0-beta2","v1.7.0-beta3","v1.7.0-beta4","v1.7.0-beta5","v2.0.0","v2.0.1","v2.0.2","v2.0.3","v2.1.0","v2.1.0-beta1","v2.1.0-beta2","v2.1.0-beta3","v2.1.0-beta4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4864.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}