{"id":"CVE-2026-15075","details":"In Eclipse Vert.x versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), DefaultRedirectHandler (vertx-core) propagates all request headers as-is across cross-origin HTTP 30x redirects. Only Content-Length is stripped; no origin comparison (scheme, host, port) is performed before copying headers to the redirect target.\nAs a result, credential headers, including Authorization, Cookie, Proxy-Authorization, and arbitrary custom headers such as X-API-Token, are forwarded to the redirect destination without the caller's knowledge.\n\n\n\n\nAn attacker who can cause a Vert.x HttpClient to issue a request that is redirected to an attacker-controlled host (for example, by supplying a URL to a webhook dispatcher, image proxy, or microservice URL fetcher) can capture bearer tokens, basic-auth credentials, session cookies, and API keys attached to the original request.","modified":"2026-07-16T03:45:26.228474461Z","published":"2026-07-14T08:15:53.650Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15075.json","cna_assigner":"eclipse","cwe_ids":["CWE-200","CWE-346"]},"references":[{"type":"WEB","url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/161"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15075.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15075"},{"type":"PACKAGE","url":"https://github.com/eclipse-vertx/vert.x"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-vertx/vert.x","events":[{"introduced":"60a85baf9138c1cf7e816587d9f59a70ed55bcf3"},{"last_affected":"b7545753dacac2add45c443574a5d1de13e2e805"},{"introduced":"6feb3f329729d6c78f6544b542b1668a3e9f6704"},{"last_affected":"753360696b3cbb3b6848a03f07a84f07f045da96"}],"database_specific":{"extracted_events":[{"introduced":"4.0.0"},{"last_affected":"4.5.29"},{"introduced":"5.0.0"},{"last_affected":"5.1.4"}],"source":"AFFECTED_FIELD"}},{"type":"GIT","repo":"https://github.com/vert-x3/vertx-web","events":[{"introduced":"0"},{"last_affected":"0dc2b837dfb99d8a179fafb1b348a4843ab00e3d"},{"introduced":"a62720242d2f515969aa34dd185d870b846be5e1"},{"last_affected":"c248720fd671d3d33a57ce72c37603989ccd2efc"}],"database_specific":{"cpe":"cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"4.5.29"},{"introduced":"5.0.0"},{"last_affected":"5.1.4"}],"source":"CPE_RANGE"}}],"versions":["4.5.29","5.1.4","5.1.3","5.1.2","4.5.28","5.1.1","5.1.0","4.5.27","4.5.26","4.5.25","4.5.24","4.5.23","4.5.22","4.5.21","4.5.20","4.5.19","4.5.18","4.5.17","4.5.16","4.5.15","5.0.0","4.5.14","4.5.13","4.5.12","4.5.11","4.5.10","4.5.9","4.5.8","4.5.7","4.5.6","4.5.5","4.5.4","4.5.3","4.5.2","4.5.1","4.5.0","4.4.5","4.4.4","4.4.3","4.4.2","4.4.1","4.4.0","4.3.5","4.3.4","4.3.3","4.3.2","4.3.1","4.3.0","4.2.5","4.2.4","4.2.3","4.2.2","4.2.1","4.2.0","4.2.0.CR1","4.2.0.Beta1","4.1.1","4.1.0","4.1.0.CR2","4.1.0.CR1","4.1.0.Beta1","4.0.3","4.0.2","4.0.1","4.0.0","4.0.0.CR2","4.0.0.CR1","4.0.0.Beta3","4.0.0.Beta1","4.0.0-milestone5","4.0.0-milestone4","4.0.0-milestone2","4.0.0-milestone1","3.6.0","3.6.0.CR2","3.6.0.CR1","3.5.1","3.5.0","3.4.2","3.4.1","3.4.0","3.4.0.Beta1","3.3.3","3.3.2","3.3.1","3.3.0","3.3.0.CR2","3.2.1","3.2.0","3.1.0","3.0.0","3.0.0-milestone6","3.0.0-milestone5","3.0.0-milestone4","3.0.0-milestone3","3.0.0-milestone2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15075.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}