{"id":"CVE-2016-4817","aliases":["EUVD-2016-5799","GHSA-32wr-c4w3-hg28"],"status":"published","title":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2...","description":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.04448,"percentile":0.91472,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2016-06-19T01:00:00Z","modified":"2026-10-20T13:17:07Z","products":[{"vendor":"dena","product":"h2o"}],"references":[{"url":"https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4","tags":["x_refsource_CONFIRM","x_transferred","fix"]},{"url":"http://jvn.jp/en/jp/JVN87859762/index.html","tags":["third-party-advisory","x_refsource_JVN","x_transferred","Vendor Advisory","advisory"]},{"url":"https://github.com/h2o/h2o/pull/920","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091","tags":["third-party-advisory","x_refsource_JVNDB","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4817"},{"url":"https://github.com/advisories/GHSA-32wr-c4w3-hg28"}],"sources":{"cve":[{"id":"CVE-2016-4817","description":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.","status":"published","published":"2016-06-19T01:00:00Z","modified":"2024-08-06T00:39:26.243Z","updated_at":"2026-11-02T14:33:35.149563Z"}],"euvd":[{"id":"EUVD-2016-5799","description":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.","status":"published","published":"2016-06-19T01:00:00Z","modified":"2024-08-06T00:39:26Z","updated_at":"2026-11-03T02:22:44.916959Z"}],"ghsa":[{"id":"GHSA-32wr-c4w3-hg28","title":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2...","description":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.","status":"published","published":"2022-05-13T01:10:46Z","modified":"2023-02-01T05:03:39Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:50:05.685198Z"}],"nvd":[{"id":"CVE-2016-4817","description":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.","status":"published","published":"2016-06-19T01:59:11.903Z","modified":"2026-06-17T00:48:16.38Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/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"}],"updated_at":"2026-11-02T14:03:26.642445Z"}],"osv":[{"id":"CVE-2016-4817","description":"lib/http2/connection.c in H2O before 1.7.3 and 2.x before 2.0.0-beta5 mishandles HTTP/2 disconnection, which allows remote attackers to cause a denial of service (use-after-free and application crash) or possibly execute arbitrary code via a crafted packet.","status":"published","published":"2016-06-19T01:59:11.903Z","modified":"2026-10-20T13:17:07.889161097Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:02.454775Z"}]}}