{"id":"CVE-2026-19203","details":"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 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.","aliases":["GHSA-xc35-c22g-239h"],"modified":"2026-09-09T03:47:13.052032851Z","published":"2026-09-08T12:08:37.576Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"11.0.0"},{"last_affected":"11.0.31"},{"introduced":"10.0.0"},{"last_affected":"10.0.31"},{"introduced":"9.4.0"},{"last_affected":"9.4.63"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"eclipse","cwe_ids":["CWE-444"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19203.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19203.json"},{"type":"ADVISORY","url":"https://github.com/jetty/jetty.project/security/advisories/GHSA-xc35-c22g-239h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19203"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jetty/jetty.project","events":[{"introduced":"c8372b65bd15404de1444d68902c0455a3a69b64"},{"last_affected":"6c1ced3f077bc633716c54758a743b09b21328e8"},{"introduced":"28100e8da711e44c0722ed10bd413ae862497539"},{"last_affected":"ceb2461aabfc7e4f362f2602ea2eeb5bd67599db"}],"database_specific":{"extracted_events":[{"introduced":"12.1.0"},{"last_affected":"12.1.11"},{"introduced":"12.0.0"},{"last_affected":"12.0.37"}],"source":"AFFECTED_FIELD"}}],"versions":["jetty-12.1.11","jetty-12.0.37","jetty-12.1.5","jetty-12.0.31","jetty-12.1.4","jetty-12.0.30","jetty-12.1.2","jetty-12.0.23","jetty-12.1.0.beta1","jetty-12.0.22","jetty-12.0.19","jetty-12.0.15","jetty-12.0.14","jetty-12.0.6","jetty-12.0.5","jetty-12.0.0x"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-19203.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}