{"id":"CVE-2019-16869","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-16869","generatedAt":"2026-10-27T23:26:34.520Z","title":"Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a \"Transfer-Encoding : chunked\" line), which leads to HTTP request smuggling.","description":"Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a \"Transfer-Encoding : chunked\" line), which leads to HTTP request smuggling.","published":"2019-09-26T16:15:12.000Z","lastModified":"2026-10-08T22:16:50.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-444"],"affected":["netty/netty","debian/debian linux","canonical/ubuntu linux","redhat/jboss enterprise application platform"],"epss":{"score":0.08645,"percentile":0.95075,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (8.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2019:3892","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3901","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0159","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0160","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0161","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0164","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0445","tags":["Third Party 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BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}