{"schema_version":"1.9.0","id":"BIT-golang-2026-56853","published":"2026-08-19T11:37:45.326Z","modified":"2026-08-19T12:25:57.945812448Z","aliases":["CVE-2026-56853","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.","affected":[{"package":{"name":"golang","ecosystem":"Bitnami","purl":"pkg:bitnami/golang"},"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"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/golang/BIT-golang-2026-56853.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"references":[{"type":"WEB","url":"https://go.dev/cl/795540"},{"type":"WEB","url":"https://go.dev/issue/80205"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56853"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-6089"}],"database_specific":{"cpes":["cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"],"severity":"High"}}