{"id":"GO-2026-6609","aliases":["BIT-golang-2026-78667","CVE-2026-78667"],"title":"Lack of limit on size of parsed Range headers in net/http","titleSource":"OSV","descriptionSource":"OSV","description":"When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.","severity":"unknown","score":null,"published":"2026-10-08T22:31:09.000Z","modified":"2026-11-14T13:12:14.205Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Go","name":"stdlib","sources":[{"name":"OSV · GO-2026-6609","url":"https://osv.dev/vulnerability/GO-2026-6609"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.26.9"},{"introduced":"1.27.0-0"},{"fixed":"1.27.2"}],"type":"SEMVER"}],"versions":[],"fixed":["1.26.9","1.27.2"]}],"sourceAffected":[],"references":["https://go.dev/cl/847309","https://go.dev/issue/81858","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"],"sources":[{"name":"OSV","id":"GO-2026-6609","modified":"2026-11-14T13:12:14.205172763Z","url":"https://osv.dev/vulnerability/GO-2026-6609"}],"assessments":[],"products":[],"remediation":[],"observedAt":"2026-11-14T15:04:41.256Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:30:33.103Z"},"coverage":[{"source":"NVD","status":"refresh-failed","attemptedAt":"2026-11-14T00:30:50.522Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-14T00:20:34.991Z","attemptedAt":"2026-11-14T00:20:34.991Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-14T00:20:35.872Z","attemptedAt":"2026-11-14T00:20:35.872Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-14T00:20:34.959Z","attemptedAt":"2026-11-14T00:20:34.959Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-78667","url":"https://www.first.org/epss/","probability":0.00663,"percentile":0.52275,"date":"2026-11-13","checkedAt":"2026-11-14T00:20:34.959Z"},{"source":"GitHub Advisory Database","id":"GHSA-f4xw-m386-m277","url":"https://github.com/advisories/GHSA-f4xw-m386-m277","modified":"2026-10-09T18:32:38Z","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-11-14T00:20:34.991Z"},{"source":"ENISA EUVD","id":"EUVD-2026-95424","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95424","modified":"Oct 9, 2026, 4:12:53 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":"2026-11-14T00:20:35.872Z"}],"aiSummary":null}