{"id":"CVE-2026-40562","summary":"Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence","details":"Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence.\n\nGazelle incorrectly prioritizes \"Content-Length\" over \"Transfer-Encoding: chunked\" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence.\n\nAn attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.","modified":"2026-07-15T01:48:53.798675034Z","published":"2026-05-06T12:36:34.715Z","database_specific":{"cna_assigner":"CPANSec","cwe_ids":["CWE-444"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40562.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/06/7"},{"type":"WEB","url":"https://cpan.org/modules"},{"type":"WEB","url":"https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40562.json"},{"type":"ADVISORY","url":"https://metacpan.org/release/KAZEBURO/Gazelle-0.50/changes"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40562"},{"type":"FIX","url":"https://security.metacpan.org/patches/G/Gazelle/0.49/CVE-2026-40562-r1.patch"},{"type":"PACKAGE","url":"https://github.com/kazeburo/Gazelle"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kazeburo/gazelle","events":[{"introduced":"0"},{"last_affected":"ddf258777dbb2e75ce3a04fe3edc31768dabc48a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"0.49"}],"source":"AFFECTED_FIELD"}}],"versions":["0.49","0.48","0.47","0.46","0.45","0.44","0.43","0.42","0.41","0.40","0.39","0.38","0.37","0.36","0.35","0.34","0.33","0.32","0.31","0.30","0.25","0.23","0.22","0.21","0.20","0.12","0.11","0.08","0.07","0.06","0.05","0.04","0.03","0.02","0.01"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40562.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}