{"id":"GO-2026-6089","summary":"Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http","details":"When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.","aliases":["BIT-golang-2026-56853","CVE-2026-56853"],"modified":"2026-10-07T10:41:45.889550693Z","published":"2026-08-13T21:43:54Z","related":["RHSA-2026:54835","RHSA-2026:54836","RHSA-2026:60304","RHSA-2026:60305","RHSA-2026:60306","RHSA-2026:61882","RHSA-2026:62404","RHSA-2026:62405","RHSA-2026:62406","RHSA-2026:62407","RHSA-2026:62578","RHSA-2026:62602","RHSA-2026:62631","RHSA-2026:62753","RHSA-2026:62754","RHSA-2026:62803","RHSA-2026:63022","RHSA-2026:63119","RHSA-2026:63124","RHSA-2026:63163","RHSA-2026:63332","RHSA-2026:64777","RHSA-2026:64786","RHSA-2026:64818","RHSA-2026:65116","RHSA-2026:65117","RHSA-2026:65153","RHSA-2026:65335","RHSA-2026:65336","RHSA-2026:65359","RHSA-2026:65534","RHSA-2026:65880","RHSA-2026:65886","RHSA-2026:65895","RHSA-2026:65918","RHSA-2026:66016","RHSA-2026:66327","RHSA-2026:66459","RHSA-2026:67128","RHSA-2026:67132","RHSA-2026:67153","RHSA-2026:67159","RHSA-2026:67160","RHSA-2026:67313","RHSA-2026:67464","RHSA-2026:67517","RHSA-2026:67518","RHSA-2026:67974","RHSA-2026:67975","RHSA-2026:68334","RHSA-2026:68335","RHSA-2026:68504","RHSA-2026:68527","RHSA-2026:69235","RHSA-2026:69961","RHSA-2026:70103","RHSA-2026:70201","RHSA-2026:70391","RHSA-2026:70640","RHSA-2026:70641","RHSA-2026:71112","RHSA-2026:71113","RHSA-2026:71114","RHSA-2026:71445","RHSA-2026:71672","RHSA-2026:72737","RHSA-2026:72805","RHSA-2026:74504","RHSA-2026:74505","RHSA-2026:74506","RHSA-2026:76795","RHSA-2026:76809"],"database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-6089"},"references":[{"type":"REPORT","url":"https://go.dev/issue/80205"},{"type":"FIX","url":"https://go.dev/cl/795540"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI"}],"affected":[{"package":{"name":"stdlib","ecosystem":"Go","purl":"pkg:golang/stdlib"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.13"},{"introduced":"1.26.0-0"},{"fixed":"1.26.6"},{"introduced":"1.27.0-0"},{"fixed":"1.27.0-rc.3"}]}],"ecosystem_specific":{"imports":[{"symbols":["ListenAndServe","ListenAndServeTLS","Serve","ServeTLS","Server.ListenAndServe","Server.ListenAndServeTLS","Server.Serve","Server.ServeTLS","conn.readRequest","conn.serve"],"path":"net/http"}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-6089.json"}}],"schema_version":"1.9.0"}