CVE-2026-69216

{"id": "CVE-2026-69216", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69216", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-16T13:53:39.504150Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "http4s", "product": "http4s", "versions": [{"status": "affected", "version": "< 0.23.35"}, {"status": "affected", "version": ">= 1.0.0-M1, < 1.0.0-M47"}]}]}], "published": "2026-09-15T19:17:38.603", "references": [{"url": "https://github.com/http4s/http4s/commit/d78612a5abd5a2547487598d3342be05573e16f0", "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-jrpm-956j-96jg", "source": "security-advisories@github.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-444"}]}], "descriptions": [{"lang": "en", "value": "Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember\u2019s 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."}], "lastModified": "2026-09-16T14:17:07.923", "sourceIdentifier": "security-advisories@github.com"}