{"id":"CVE-2026-102479","details":"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 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.","aliases":["GHSA-ch7p-g5pm-3gqx"],"modified":"2026-10-15T10:47:27.492881371Z","published":"2026-10-14T18:43:54.623Z","database_specific":{"cna_assigner":"eclipse","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102479.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102479.json"},{"type":"ADVISORY","url":"https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx"},{"type":"WEB","url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/352"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102479"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-vertx/vert.x","events":[{"introduced":"6feb3f329729d6c78f6544b542b1668a3e9f6704"},{"last_affected":"244f9e7d87f854961df930b2383a990999523be9"},{"introduced":"0112a830307b3e4480432c34cdaa66247fba2d74"},{"last_affected":"589d976bdd5456a6caf6f0cfafaadbc29873379e"},{"introduced":"a38832fbdabfa2fdb418988b9cc36831765a2ecd"},{"last_affected":"a38832fbdabfa2fdb418988b9cc36831765a2ecd"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"5.0.0"},{"last_affected":"5.0.12"},{"introduced":"5.1.0"},{"last_affected":"5.1.9"},{"introduced":"5.2.0"},{"last_affected":"5.2.0"}]}}],"versions":["5.2.0","5.0.12","5.0.11","5.0.10","5.0.9","5.0.8","5.0.7","5.0.6","5.0.5","5.0.4","5.0.3","5.0.2","5.0.1","5.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102479.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}