{"id":"CVE-2026-19203","title":"A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\n\n\n\n\nThis is caused by…","summary":"A client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\n\n\n\n\nThis is caused by…","severity":"high","cvss":8.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-444"],"vendor":"Eclipse Foundation","product":"Eclipse Jetty","affected":["eclipse_jetty >= 12.1.0 <= 12.1.11","eclipse_jetty >= 12.0.0 <= 12.0.37","eclipse_jetty >= 11.0.0 <= 11.0.31","eclipse_jetty >= 10.0.0 <= 10.0.31","eclipse_jetty >= 9.4.0 <= 9.4.63"],"published":"2026-09-08","updated":"2026-09-08","sourceUpdated":"2026-09-08T15:18:42.667","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-19203","references":[{"url":"https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h","label":"emo@eclipse.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19203.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-19203"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2529768"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-19203"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19203"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T14:21:37.718183Z"},"cvssSource":"cna","ingestedAt":"2026-09-08T15:33:26.984Z","epss":0.00289,"epssPercentile":0.21712,"scores":{"cna":8.3,"vendor":8.2},"slug":"CVE-2026-19203","body":"## Overview\n\nA client may issue specially crafted HTTP/1.1 chunked requests to a Jetty server that cause Jetty and an intermediary proxy to interpret different request boundaries, potentially resulting in HTTP request smuggling.\n\n\n\n\nThis is caused by Jetty accepting a lone LF character as a terminator in parts of chunked request parsing. Depending on the Jetty version and configured HTTP compliance mode, this may occur in chunk extensions, chunk data termination, or trailer termination.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 9, Exploit Intelligence, OpenShift Developer Tools and Services, Red Hat AMQ Broker 7, Red Hat build of Apache Camel - HawtIO 4, Red Hat build of Apache Camel 4 for Quarkus 3, … · no fix planned: Red Hat Enterprise Linux 9 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19203.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}