CVE-2026-94440

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-94440", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-09-21T16:43:04.757Z", "datePublished": "2026-10-08T22:53:58.959Z", "dateUpdated": "2026-10-09T16:09:59.426Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-10-08T22:53:58.959Z"}, "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", "collectionURL": "https://pkg.go.dev", "packageName": "net/textproto", "versions": [{"version": "0", "lessThan": "1.26.9", "status": "affected", "versionType": "semver"}, {"version": "1.27.0-0", "lessThan": "1.27.2", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "readMIMEHeader"}, {"name": "Reader.readContinuedLineSlice"}, {"name": "Reader.ReadContinuedLine"}, {"name": "Reader.ReadContinuedLineBytes"}, {"name": "Reader.ReadMIMEHeader"}], "defaultStatus": "unaffected"}, {"vendor": "Go standard library", "product": "mime/multipart", "collectionURL": "https://pkg.go.dev", "packageName": "mime/multipart", "versions": [{"version": "0", "lessThan": "1.26.9", "status": "affected", "versionType": "semver"}, {"version": "1.27.0-0", "lessThan": "1.27.2", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "Part.populateHeaders"}, {"name": "Reader.readForm"}, {"name": "Reader.NextPart"}, {"name": "Reader.NextRawPart"}, {"name": "Reader.ReadForm"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling"}]}], "references": [{"url": "https://go.dev/cl/847307"}, {"url": "https://go.dev/issue/81741"}, {"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"}, {"url": "https://pkg.go.dev/vuln/GO-2026-6608"}], "credits": [{"lang": "en", "value": "Jakub Ciolek (https://ciolek.dev)"}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-770", "lang": "en", "description": "CWE-770 Allocation of Resources Without Limits or Throttling"}]}], "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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-09T16:09:59.426Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"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": {"id": "CVE-2026-94440", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-09T16:09:04.864512Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-770", "description": "CWE-770 Allocation of Resources Without Limits or Throttling"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-09T16:08:45.696Z"}}], "cna": {"title": "Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart", "credits": [{"lang": "en", "value": "Jakub Ciolek (https://ciolek.dev)"}], "affected": [{"vendor": "Go standard library", "product": "net/textproto", "versions": [{"status": "affected", "version": "0", "lessThan": "1.26.9", "versionType": "semver"}, {"status": "affected", "version": "1.27.0-0", "lessThan": "1.27.2", "versionType": "semver"}], "packageName": "net/textproto", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "programRoutines": [{"name": "readMIMEHeader"}, {"name": "Reader.readContinuedLineSlice"}, {"name": "Reader.ReadContinuedLine"}, {"name": "Reader.ReadContinuedLineBytes"}, {"name": "Reader.ReadMIMEHeader"}]}, {"vendor": "Go standard library", "product": "mime/multipart", "versions": [{"status": "affected", "version": "0", "lessThan": "1.26.9", "versionType": "semver"}, {"status": "affected", "version": "1.27.0-0", "lessThan": "1.27.2", "versionType": "semver"}], "packageName": "mime/multipart", "collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "programRoutines": [{"name": "Part.populateHeaders"}, {"name": "Reader.readForm"}, {"name": "Reader.NextPart"}, {"name": "Reader.NextRawPart"}, {"name": "Reader.ReadForm"}]}], "references": [{"url": "https://go.dev/cl/847307"}, {"url": "https://go.dev/issue/81741"}, {"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"}, {"url": "https://pkg.go.dev/vuln/GO-2026-6608"}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling"}]}], "providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-10-08T22:53:58.959Z"}}}, "cveMetadata": {"cveId": "CVE-2026-94440", "state": "PUBLISHED", "dateUpdated": "2026-10-09T16:09:59.426Z", "dateReserved": "2026-09-21T16:43:04.757Z", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "datePublished": "2026-10-08T22:53:58.959Z", "assignerShortName": "Go"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "packageName": "net/textproto", "product": "net/textproto", "programRoutines": [{"name": "readMIMEHeader"}, {"name": "Reader.readContinuedLineSlice"}, {"name": "Reader.ReadContinuedLine"}, {"name": "Reader.ReadContinuedLineBytes"}, {"name": "Reader.ReadMIMEHeader"}], "vendor": "Go standard library", "versions": [{"lessThan": "1.26.9", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "1.27.2", "status": "affected", "version": "1.27.0-0", "versionType": "semver"}]}, {"collectionURL": "https://pkg.go.dev", "defaultStatus": "unaffected", "packageName": "mime/multipart", "product": "mime/multipart", "programRoutines": [{"name": "Part.populateHeaders"}, {"name": "Reader.readForm"}, {"name": "Reader.NextPart"}, {"name": "Reader.NextRawPart"}, {"name": "Reader.ReadForm"}], "vendor": "Go standard library", "versions": [{"lessThan": "1.26.9", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "1.27.2", "status": "affected", "version": "1.27.0-0", "versionType": "semver"}]}], "source": "security@golang.org"}], "cveTags": [], "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."}], "id": "CVE-2026-94440", "lastModified": "2026-10-09T17:16:50.907", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-94440", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-09T16:09:04.864512Z", "version": "2.0.3"}}]}, "published": "2026-10-08T23:17:04.917", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/847307"}, {"source": "security@golang.org", "url": "https://go.dev/issue/81741"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-6608"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.26.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.27.0-0,1.27.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "mime/multipart", "vendor": "go_standard_library"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.26.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.27.0-0,1.27.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "net/textproto", "vendor": "go_standard_library"}], "created": "2026-10-09T01:00:14.863663+00:00", "updated": "2026-10-09T21:00:13.957540+00:00", "vendors": ["go_standard_library", "go_standard_library$PRODUCT$mime/multipart", "go_standard_library$PRODUCT$net/textproto"]}