{"id":"GO-2026-6617","aliases":["BIT-golang-2026-97032","CVE-2026-97032"],"title":"HTTP/2 server crash due to HPACK encoder race in net/http","titleSource":"OSV","descriptionSource":"OSV","description":"HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server.","severity":"unknown","score":null,"published":"2026-10-08T22:31:09.000Z","modified":"2026-11-14T13:12:14.222Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Go","name":"stdlib","sources":[{"name":"OSV · GO-2026-6617","url":"https://osv.dev/vulnerability/GO-2026-6617"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.26.9"}],"type":"SEMVER"}],"versions":[],"fixed":["1.26.9"]},{"ecosystem":"Go","name":"stdlib","sources":[{"name":"OSV · GO-2026-6617","url":"https://osv.dev/vulnerability/GO-2026-6617"}],"ranges":[{"events":[{"introduced":"1.27.0-0"},{"fixed":"1.27.2"}],"type":"SEMVER"}],"versions":[],"fixed":["1.27.2"]},{"ecosystem":"Go","name":"golang.org/x/net","sources":[{"name":"OSV · GO-2026-6617","url":"https://osv.dev/vulnerability/GO-2026-6617"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"0.60.0"}],"type":"SEMVER"}],"versions":[],"fixed":["0.60.0"]}],"sourceAffected":[],"references":["https://go.dev/cl/847188","https://go.dev/cl/847313","https://go.dev/issue/81867","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"],"sources":[{"name":"OSV","id":"GO-2026-6617","modified":"2026-11-14T13:12:14.222191133Z","url":"https://osv.dev/vulnerability/GO-2026-6617"}],"assessments":[],"products":[],"remediation":[],"observedAt":"2026-11-14T15:04:20.843Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:30:33.103Z"},"coverage":[{"source":"NVD","status":"refresh-failed","attemptedAt":"2026-11-14T00:15:32.502Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-14T00:05:33.606Z","attemptedAt":"2026-11-14T00:05:33.606Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-14T00:05:34.580Z","attemptedAt":"2026-11-14T00:05:34.580Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-14T00:05:33.686Z","attemptedAt":"2026-11-14T00:05:33.686Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-97032","url":"https://www.first.org/epss/","probability":0.00676,"percentile":0.52801,"date":"2026-11-13","checkedAt":"2026-11-14T00:05:33.686Z"},{"source":"ENISA EUVD","id":"EUVD-2026-95429","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95429","modified":"Oct 15, 2026, 3:46:39 PM","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-11-14T00:05:34.580Z"}],"aiSummary":null}