CVE-2016-4817

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.

• http://jvn.jp/en/jp/JVN87859762/index.htmlVendor Advisory
• http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091Vendor Advisory
• https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
• https://github.com/h2o/h2o/pull/920Vendor Advisory
• http://jvn.jp/en/jp/JVN87859762/index.htmlVendor Advisory
• http://jvndb.jvn.jp/jvndb/JVNDB-2016-000091Vendor Advisory
• https://github.com/h2o/h2o/commit/1c0808d580da09fdec5a9a74ff09e103ea058dd4
• https://github.com/h2o/h2o/pull/920Vendor Advisory

Published

Jun 19, 2016

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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