{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-43859","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2025-04-17T20:07:08.556Z","datePublished":"2025-04-24T18:15:53.328Z","dateUpdated":"2025-04-24T19:02:45.130Z"},"containers":{"cna":{"title":"h11 accepts some malformed Chunked-Encoding bodies","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":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/python-hyper/h11/security/advisories/GHSA-vqfr-h8mv-ghfj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/python-hyper/h11/security/advisories/GHSA-vqfr-h8mv-ghfj"},{"name":"https://github.com/python-hyper/h11/commit/114803a29ce50116dc47951c690ad4892b1a36ed","tags":["x_refsource_MISC"],"url":"https://github.com/python-hyper/h11/commit/114803a29ce50116dc47951c690ad4892b1a36ed"}],"affected":[{"vendor":"python-hyper","product":"h11","versions":[{"version":"< 0.16.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2025-04-24T18:15:53.328Z"},"descriptions":[{"lang":"en","value":"h11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of line terminators in chunked-coding message bodies can lead to request smuggling vulnerabilities under certain conditions. This issue has been patched in version 0.16.0. Since exploitation requires the combination of buggy h11 with a buggy (reverse) proxy, fixing either component is sufficient to mitigate this issue."}],"source":{"advisory":"GHSA-vqfr-h8mv-ghfj","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-04-24T19:02:05.000674Z","id":"CVE-2025-43859","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2025-04-24T19:02:45.130Z"}}]}}