{"id":"CVE-2026-94440","state":"PUBLISHED","title":"Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart","description":"Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes.","publishedAt":"2026-10-08T22:53:58.959Z","updatedAt":"2026-10-09T16:09:59.426Z","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/textproto","Go standard library mime/multipart"],"affected":[{"vendor":"Go standard library","product":"net/textproto","packageName":"net/textproto","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":"readMIMEHeader"},{"name":"Reader.readContinuedLineSlice"},{"name":"Reader.ReadContinuedLine"},{"name":"Reader.ReadContinuedLineBytes"},{"name":"Reader.ReadMIMEHeader"}]},{"vendor":"Go standard library","product":"mime/multipart","packageName":"mime/multipart","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":"Part.populateHeaders"},{"name":"Reader.readForm"},{"name":"Reader.NextPart"},{"name":"Reader.NextRawPart"},{"name":"Reader.ReadForm"}]}],"references":["https://go.dev/cl/847307","https://go.dev/issue/81741","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","https://pkg.go.dev/vuln/GO-2026-6608"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/94xxx/CVE-2026-94440.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-94440","state":"PUBLISHED","datePublished":"2026-10-08T22:53:58.959Z","dateUpdated":"2026-10-09T16:09:59.426Z","assignerShortName":"Go","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateReserved":"2026-09-21T16:43:04.757Z"},"containers":{"cna":{"title":"Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart","descriptions":[{"lang":"en","value":"Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes."}],"affected":[{"vendor":"Go standard library","product":"net/textproto","packageName":"net/textproto","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":"readMIMEHeader"},{"name":"Reader.readContinuedLineSlice"},{"name":"Reader.ReadContinuedLine"},{"name":"Reader.ReadContinuedLineBytes"},{"name":"Reader.ReadMIMEHeader"}]},{"vendor":"Go standard 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(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":"2026-10-09T16:09:04.864512Z","id":"CVE-2026-94440","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":"2026-10-09T16:09:59.426Z"}}]}}}