{"id":"CVE-2026-42585","aliases":["GHSA-38f8-5428-x5cv"],"url":"https://o3.security/vulnerability/CVE-2026-42585","summary":"Netty: HTTP Request Smuggling due to malformed Transfer-Encoding","details":"Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty incorrectly parses malformed Transfer-Encoding, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.","published":"2026-05-13T18:12:39.586Z","modified":"2026-08-12T03:51:45.598159158Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00248,"percentile":0.15852,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty:netty-codec-http","fixedVersion":"4.2.13.Final"},{"ecosystem":"Maven","name":"io.netty:netty-codec-http","fixedVersion":"4.1.133.Final"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42585.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42585"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:45.598159158Z"}}