{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-69216","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-03T16:57:50.125Z","datePublished":"2026-09-15T18:59:50.609Z","dateUpdated":"2026-09-16T13:53:52.337Z"},"containers":{"cna":{"title":"Http4s: Ember chunk parser lenience (TE.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":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/http4s/http4s/security/advisories/GHSA-jrpm-956j-96jg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/http4s/http4s/security/advisories/GHSA-jrpm-956j-96jg"},{"name":"https://github.com/http4s/http4s/commit/d78612a5abd5a2547487598d3342be05573e16f0","tags":["x_refsource_MISC"],"url":"https://github.com/http4s/http4s/commit/d78612a5abd5a2547487598d3342be05573e16f0"},{"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":"2026-09-15T18:59:50.609Z"},"descriptions":[{"lang":"en","value":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember’s chunk decoder trims the chunk-size token and accepts leading plus or minus signs instead of requiring one or more hexadecimal digits followed by the required CRLF. When an intermediary forwards chunked data without re-encoding and interprets malformed chunk boundaries differently, an unauthenticated attacker can create TE.TE request smuggling that bypasses intermediary controls, poisons caches, or hijacks the request queue. The same response-path leniency can enable response smuggling against an ember-client used as a gateway when the upstream is malicious or compromised. This issue is fixed in versions 0.23.35 and 1.0.0-M47."}],"source":{"advisory":"GHSA-jrpm-956j-96jg","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T13:53:39.504150Z","id":"CVE-2026-69216","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-09-16T13:53:52.337Z"}}]}}