{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42580","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-28T17:26:12.085Z","datePublished":"2026-05-13T18:04:03.690Z","dateUpdated":"2026-05-14T18:21:13.322Z"},"containers":{"cna":{"title":"Netty: HTTP Request Smuggling due to incorrect chunk size parsing","problemTypes":[{"descriptions":[{"cweId":"CWE-444","lang":"en","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723"}],"affected":[{"vendor":"netty","product":"netty","versions":[{"version":">= 4.2.0.Alpha1, < 4.2.13.Final","status":"affected"},{"version":"< 4.1.133.Final","status":"affected"}]},{"vendor":"io.netty","product":"netty-codec-http","versions":[{"version":">= 4.2.0.Alpha1, < 4.2.13.Final","status":"affected"},{"version":"< 4.1.133.Final","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-13T18:04:03.690Z"},"descriptions":[{"lang":"en","value":"Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final."}],"source":{"advisory":"GHSA-m4cv-j2px-7723","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-14T18:21:08.229314Z","id":"CVE-2026-42580","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"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":"2026-05-14T18:21:13.322Z"}}]}}