{"schemaVersion":3,"id":"CVE-2026-102479","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-10-14T18:43:54.623Z","modified":"2026-10-16T18:23:47.949Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.7,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"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","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.7,"severity":"high","vector":"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","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.7,"severity":"high","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00274,"percentile":0.18613,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00274,"percentile":0.18613}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00274,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00274,"percentile":0.18613}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","description":"The product acts as an intermediary HTTP agent\n         (such as a proxy or firewall) in the data flow between two\n         entities such as a client and server, but it does not\n         interpret malformed HTTP requests or responses in ways that\n         are consistent with how the messages will be processed by\n         those entities that are at the ultimate destination.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/444.html"}],"affected":[{"vendor":"eclipse foundation","product":"eclipse vert.x","name":"Eclipse Vert.x","label":"eclipse vert.x","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 5.0.0, ≤ 5.0.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 5.1.0, ≤ 5.1.9","noFixRecorded":false,"fixedIn":null},{"text":"5.2.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 5.0.0, ≤ 5.0.12 | ≥ 5.1.0, ≤ 5.1.9 | 5.2.0","eol":null,"hubHref":"/vendor/eclipse_foundation/eclipse_vertx"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx","label":"github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx","hostname":"github.com","tags":[]},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/352","label":"gitlab.eclipse.org/security/cve-assignment/-/work_items/352","hostname":"gitlab.eclipse.org","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-14T18:43:54.623Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-16T18:23:47.949Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:28:24.649Z","stale":false,"partial":false}}