CVE-2026-69204

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-69204", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-03T16:57:50.124Z", "datePublished": "2026-09-15T18:43:14.850Z", "dateUpdated": "2026-09-15T19:00:49.739Z"}, "containers": {"cna": {"title": "Http4s: Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)", "problemTypes": [{"descriptions": [{"cweId": "CWE-444", "lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.2, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/http4s/http4s/security/advisories/GHSA-8h4c-x2wg-6xp8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/http4s/http4s/security/advisories/GHSA-8h4c-x2wg-6xp8"}, {"name": "https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810", "tags": ["x_refsource_MISC"], "url": "https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810"}, {"name": "https://github.com/http4s/http4s/releases/tag/v0.23.35", "tags": ["x_refsource_MISC"], "url": "https://github.com/http4s/http4s/releases/tag/v0.23.35"}, {"name": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47", "tags": ["x_refsource_MISC"], "url": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47"}], "affected": [{"vendor": "http4s", "product": "http4s", "versions": [{"version": "< 0.23.35", "status": "affected"}, {"version": ">= 1.0.0-M1, < 1.0.0-M47", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-15T18:43:14.850Z"}, "descriptions": [{"lang": "en", "value": "Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary that forwards both headers and frames by Content-Length, an unauthenticated attacker can smuggle a second request, bypass intermediary access controls, poison caches, or cause a victim request to be joined to an attacker-controlled prefix. The shared response parser can also desynchronize an ember-client connection when a malicious or compromised upstream sends both headers. This issue is fixed in versions 0.23.35 and 1.0.0-M47."}], "source": {"advisory": "GHSA-8h4c-x2wg-6xp8", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-15T19:00:36.832324Z", "id": "CVE-2026-69204", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-15T19:00:49.739Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-69204", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-15T19:00:36.832324Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-15T19:00:46.496Z"}}], "cna": {"title": "Http4s: Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)", "source": {"advisory": "GHSA-8h4c-x2wg-6xp8", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.2, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "http4s", "product": "http4s", "versions": [{"status": "affected", "version": "< 0.23.35"}, {"status": "affected", "version": ">= 1.0.0-M1, < 1.0.0-M47"}]}], "references": [{"url": "https://github.com/http4s/http4s/security/advisories/GHSA-8h4c-x2wg-6xp8", "name": "https://github.com/http4s/http4s/security/advisories/GHSA-8h4c-x2wg-6xp8", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810", "name": "https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/http4s/http4s/releases/tag/v0.23.35", "name": "https://github.com/http4s/http4s/releases/tag/v0.23.35", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47", "name": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary that forwards both headers and frames by Content-Length, an unauthenticated attacker can smuggle a second request, bypass intermediary access controls, poison caches, or cause a victim request to be joined to an attacker-controlled prefix. The shared response parser can also desynchronize an ember-client connection when a malicious or compromised upstream sends both headers. This issue is fixed in versions 0.23.35 and 1.0.0-M47."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-444", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-15T18:43:14.850Z"}}}, "cveMetadata": {"cveId": "CVE-2026-69204", "state": "PUBLISHED", "dateUpdated": "2026-09-15T19:00:49.739Z", "dateReserved": "2026-08-03T16:57:50.124Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-15T18:43:14.850Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "http4s", "vendor": "http4s", "versions": [{"status": "affected", "version": "< 0.23.35"}, {"status": "affected", "version": ">= 1.0.0-M1, < 1.0.0-M47"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary that forwards both headers and frames by Content-Length, an unauthenticated attacker can smuggle a second request, bypass intermediary access controls, poison caches, or cause a victim request to be joined to an attacker-controlled prefix. The shared response parser can also desynchronize an ember-client connection when a malicious or compromised upstream sends both headers. This issue is fixed in versions 0.23.35 and 1.0.0-M47."}], "id": "CVE-2026-69204", "lastModified": "2026-09-16T20:39:16.610", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "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": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/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": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69204", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-15T19:00:36.832324Z", "version": "2.0.3"}}]}, "published": "2026-09-15T19:17:37.580", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/http4s/http4s/commit/9feaf8677951a52af906ae9664ff6f0543d9d810"}, {"source": "security-advisories@github.com", "url": "https://github.com/http4s/http4s/releases/tag/v0.23.35"}, {"source": "security-advisories@github.com", "url": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47"}, {"source": "security-advisories@github.com", "url": "https://github.com/http4s/http4s/security/advisories/GHSA-8h4c-x2wg-6xp8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.23.35)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.0.0-M1,1.0.0-M47)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "http4s", "source": "cna", "vendor": "http4s"}, "product": "http4s", "vendor": "http4s"}], "created": "2026-09-15T22:15:16.807422+00:00", "updated": "2026-09-20T13:15:14.357026+00:00", "vendors": ["http4s", "http4s$PRODUCT$http4s"]}