{"id":"CVE-2026-102479","title":"In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of thi…","summary":"In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of thi…","severity":"high","published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:17:05.313","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102479","references":[{"url":"https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx","label":"emo@eclipse.org"},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/352","label":"emo@eclipse.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-14T19:49:57.603Z","vendor":"Eclipse Foundation","product":"Eclipse Vert.x","affected":["eclipse_vert.x >= 5.0.0 <= 5.0.12","eclipse_vert.x >= 5.1.0 <= 5.1.9","eclipse_vert.x 5.2.0"],"cvss":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","slug":"CVE-2026-102479","body":"## Overview\n\nIn Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of this list, allowing for instance Content-Xength to be interpeted as Content-Length.\n\n\n\nThis can be exploited for request smuggling purpose.\n\n\n\nThe impacted component is io.vertx:vertx-core.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":221832,"id":"CVE-2026-102479","ts":1792035844999,"field":"cvss","old":null,"new":"8.7"},{"seq":221831,"id":"CVE-2026-102479","ts":1792035844999,"field":"severity","old":"none","new":"high"}]}