{"id":"CVE-2026-78667","revision":"c21bfd8bee324ea089c4d66c9ea241b0","records":[{"revision":"c21bfd8bee324ea089c4d66c9ea241b0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-78667","aliases":[],"title":"Lack of limit on size of parsed Range headers in net/http","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.","state":0,"publishedAt":"2026-10-08T22:53:59.148+00:00","modifiedAt":"2026-10-09T16:12:53.569+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"net/http","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"net/http\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"net/http\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.26.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"1.27.0-0\",\n                            \"lessThan\": \"1.27.2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"parseRange\"\n                        },\n                        {\n                            \"name\": \"ServeContent\"\n                        },\n                        {\n                            \"name\": \"ServeFile\"\n                        },\n                        {\n                            \"name\": \"ServeFileFS\"\n                        },\n                        {\n                            \"name\": \"fileHandler.ServeHTTP\"\n                        },\n                        {\n                            \"name\": \"fileTransport.RoundTrip\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/cl/847309","https://go.dev/issue/81858","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://pkg.go.dev/vuln/GO-2026-6609"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-78667","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-78667","identifiers":["CVE-2026-78667"]},"retained":false,"historicalAffected":[]}],"coverage":[]}