{"id":"BIT-golang-2026-78669","summary":"Excessive CPU consumption from repeated initial window changes in net/http","details":"A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.","aliases":["CVE-2026-78669","GO-2026-6611"],"modified":"2026-10-16T09:55:38.952277866Z","published":"2026-10-16T08:40:06.076Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://go.dev/cl/847186"},{"type":"WEB","url":"https://go.dev/cl/847308"},{"type":"WEB","url":"https://go.dev/issue/81742"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78669"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-6611"}],"affected":[{"package":{"name":"golang","ecosystem":"Bitnami","purl":"pkg:bitnami/golang"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.26.9"},{"introduced":"1.27.0-0"},{"fixed":"1.27.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/golang/BIT-golang-2026-78669.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"}]}],"schema_version":"1.9.0"}