{"id":"CVE-2026-78667","state":"PUBLISHED","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.","publishedAt":"2026-10-08T22:53:59.148Z","updatedAt":"2026-10-09T16:12:53.569Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Go","products":["Go standard library net/http"],"affected":[{"vendor":"Go standard library","product":"net/http","packageName":"net/http","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.26.9","versionType":"semver"},{"version":"1.27.0-0","status":"affected","lessThan":"1.27.2","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"parseRange"},{"name":"ServeContent"},{"name":"ServeFile"},{"name":"ServeFileFS"},{"name":"fileHandler.ServeHTTP"},{"name":"fileTransport.RoundTrip"}]}],"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"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/78xxx/CVE-2026-78667.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-78667","state":"PUBLISHED","datePublished":"2026-10-08T22:53:59.148Z","dateUpdated":"2026-10-09T16:12:53.569Z","assignerShortName":"Go","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateReserved":"2026-08-24T23:36:15.738Z"},"containers":{"cna":{"title":"Lack of limit on size of parsed Range headers in net/http","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Go standard library","product":"net/http","packageName":"net/http","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.26.9","versionType":"semver"},{"version":"1.27.0-0","status":"affected","lessThan":"1.27.2","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"parseRange"},{"name":"ServeContent"},{"name":"ServeFile"},{"name":"ServeFileFS"},{"name":"fileHandler.ServeHTTP"},{"name":"fileTransport.RoundTrip"}]}],"references":[{"url":"https://go.dev/cl/847309"},{"url":"https://go.dev/issue/81858"},{"url":"https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"},{"url":"https://pkg.go.dev/vuln/GO-2026-6609"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling"}]}],"providerMetadata":{"shortName":"Go","orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateUpdated":"2026-10-08T22:53:59.148Z"},"credits":[{"lang":"en","value":"Jakub Ciolek (https://ciolek.dev)"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-09T16:12:49.383383Z","id":"CVE-2026-78667","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","type":"CWE","lang":"en","description":"CWE-770 Allocation of Resources Without Limits or Throttling"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-09T16:12:53.569Z"}}]}}}