{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66357", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-08-17T20:00:02.207Z", "datePublished": "2026-09-01T14:40:50.526Z", "dateUpdated": "2026-09-01T15:56:07.942Z"}, "containers": {"cna": {"affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "packageName": "otp", "packageURL": "pkg:sid/erlang.org/otp", "product": "OTP", "vendor": "Erlang", "versions": [{"lessThan": "17.0", "status": "unknown", "version": "0", "versionType": "otp"}, {"lessThan": "27.3.4.17", "status": "affected", "version": "17.0", "versionType": "otp"}, {"lessThan": "28.5.0.6", "status": "affected", "version": "28.0", "versionType": "otp"}, {"lessThan": "29.0.6", "status": "affected", "version": "29.0", "versionType": "otp"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "packageName": "inets", "packageURL": "pkg:otp/inets", "product": "OTP", "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"lessThan": "5.10", "status": "unknown", "version": "0", "versionType": "otp"}, {"lessThan": "9.3.2.7", "status": "affected", "version": "5.10", "versionType": "otp"}, {"lessThan": "9.6.2.3", "status": "affected", "version": "9.4", "versionType": "otp"}, {"lessThan": "9.7.2", "status": "affected", "version": "9.7", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "220d618d2479a7180b4a06d0c5aacfaa4af4a85b", "status": "unaffected"}, {"at": "273d8958de38ff2a7fe0c5dcc5b6bfe6f65717f3", "status": "unaffected"}, {"at": "e640d599287d2eba919e6f13b91f042d7dbe6ff4", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "84adefa331c4159d432d22840663c38f155cd4c1", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "27.3.4.17", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "28.5.0.6", "versionStartIncluding": "28.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "29.0.6", "versionStartIncluding": "29.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Lukas Backstr\u00f6m / Erlang Solutions"}, {"lang": "en", "type": "remediation developer", "value": "Konrad Pietrzak / Ericsson"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>httpd has never implemented obs-fold (RFC 2616 \u00a72.2 / RFC 7230 \u00a73.2.4 header continuation lines). 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{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-66357", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-01T15:56:00.806246Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-01T15:56:05.116Z"}}], "cna": {"title": "inets,httpd:HTTP Request Smuggling via obs-fold Header Continuation", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Lukas Backstr\u00f6m / Erlang Solutions"}, {"lang": "en", "type": "remediation developer", "value": "Konrad Pietrzak / Ericsson"}], "impacts": [{"capecId": "CAPEC-33", "descriptions": [{"lang": "en", "value": "CAPEC-33 HTTP Request Smuggling"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:L/SA:N", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "vendor": "Erlang", "product": "OTP", "versions": [{"status": "unknown", "version": "0", "lessThan": "17.0", "versionType": "otp"}, {"status": "affected", "version": "17.0", "lessThan": "27.3.4.17", "versionType": "otp"}, {"status": "affected", "version": "28.0", "lessThan": "28.5.0.6", "versionType": "otp"}, {"status": "affected", "version": "29.0", "lessThan": "29.0.6", "versionType": "otp"}], "packageURL": "pkg:sid/erlang.org/otp", "packageName": "otp", "defaultStatus": "unaffected"}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "product": "OTP", "versions": [{"status": "unknown", "version": "0", "lessThan": "5.10", "versionType": "otp"}, {"status": "affected", "version": "5.10", "lessThan": "9.3.2.7", "versionType": "otp"}, {"status": "affected", "version": "9.4", "lessThan": "9.6.2.3", "versionType": "otp"}, {"status": "affected", "version": "9.7", "lessThan": "9.7.2", "versionType": "otp"}], "packageURL": "pkg:otp/inets", "packageName": "inets", "defaultStatus": "unaffected"}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "product": "OTP", "versions": [{"status": "affected", "changes": [{"at": "220d618d2479a7180b4a06d0c5aacfaa4af4a85b", "status": "unaffected"}, {"at": "273d8958de38ff2a7fe0c5dcc5b6bfe6f65717f3", "status": "unaffected"}, {"at": "e640d599287d2eba919e6f13b91f042d7dbe6ff4", "status": "unaffected"}], "version": "84adefa331c4159d432d22840663c38f155cd4c1", "lessThan": "*", "versionType": "git"}], "packageURL": "pkg:github/erlang/otp", "packageName": "erlang/otp", "collectionURL": "https://github.com", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/erlang/otp/security/advisories/GHSA-qh2f-33hj-37qf", "tags": ["vendor-advisory"]}, {"url": "https://cna.erlef.org/cves/CVE-2026-66357.html", "tags": ["related"]}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-66357", "tags": ["related"]}, {"url": "https://github.com/erlang/otp/commit/220d618d2479a7180b4a06d0c5aacfaa4af4a85b", "tags": ["patch"]}, {"url": "https://github.com/erlang/otp/commit/273d8958de38ff2a7fe0c5dcc5b6bfe6f65717f3", "tags": ["patch"]}, {"url": "https://github.com/erlang/otp/commit/e640d599287d2eba919e6f13b91f042d7dbe6ff4", "tags": ["patch"]}], "descriptions": [{"lang": "en", "value": "httpd has never implemented obs-fold (RFC 2616 \u00a72.2 / RFC 7230 \u00a73.2.4 header continuation lines). 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This missing feature became a security concern as the understanding of HTTP request smuggling attacks evolved.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, from OTP\u00a028.0 before OTP\u00a028.5.0.6, and from OTP\u00a029.0 before OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. 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Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."}], "id": "CVE-2026-66357", "lastModified": "2026-09-01T21:15:00.147", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66357", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-01T15:56:00.806246Z", "version": "2.0.3"}}]}, "published": "2026-09-01T15:17:23.047", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-66357.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/220d618d2479a7180b4a06d0c5aacfaa4af4a85b"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/273d8958de38ff2a7fe0c5dcc5b6bfe6f65717f3"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/e640d599287d2eba919e6f13b91f042d7dbe6ff4"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/security/advisories/GHSA-qh2f-33hj-37qf"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-66357"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[17.0,27.3.4.17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[28.0,28.5.0.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[29.0,29.0.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10,9.3.2.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4,9.6.2.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.7,9.7.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[84adefa331c4159d432d22840663c38f155cd4c1,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "erlang/otp", "vendor": "erlang"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10,9.3.2.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4,9.6.2.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.7,9.7.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "otp", "vendor": "erlang"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[84adefa331c4159d432d22840663c38f155cd4c1,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "otp", "vendor": "erlang"}], "created": "2026-09-01T16:30:17.858637+00:00", "updated": "2026-09-01T19:00:12.788472+00:00", "vendors": ["erlang", "erlang$PRODUCT$erlang/otp", "erlang$PRODUCT$otp"]}