{"id":"CVE-2026-83589","aliases":["EUVD-2026-90589","GHSA-8c7h-7vm9-jhj3"],"status":"published","title":"Oauth-proxy: open redirect via /\\ and /\\t bypass in post-login redirect","description":"A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00384,"percentile":0.32914,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601"],"published":"2026-10-01T09:17:43Z","modified":"2026-11-10T11:22:56Z","products":[{"vendor":"red hat","product":"red hat openshift container platform 4.12"},{"vendor":"red hat","product":"red hat openshift container platform 4.14"},{"vendor":"red hat","product":"red hat openshift container platform 4.15"},{"vendor":"red hat","product":"red hat openshift container platform 4.16"},{"vendor":"red hat","product":"red hat openshift container platform 4.18"},{"vendor":"red hat","product":"red hat openshift container platform 4.19"},{"vendor":"red hat","product":"red hat openshift container platform 4.20"},{"vendor":"red hat","product":"red hat openshift container platform 4.21"},{"vendor":"red hat","product":"red hat openshift container platform 4.22"},{"vendor":"red hat","product":"red hat openshift container platform 5"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:74380","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:74383","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:74429","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:79039","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:79169","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:82785","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:82813","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:89715","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:90274","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-83589","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2518379","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83589"},{"url":"https://github.com/advisories/GHSA-8c7h-7vm9-jhj3"}],"sources":{"cve":[{"id":"CVE-2026-83589","title":"Oauth-proxy: open redirect via /\\ and /\\t bypass in post-login redirect","description":"A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.","status":"published","published":"2026-10-01T09:17:43.584Z","modified":"2026-11-10T11:22:56.14Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-601"],"updated_at":"2026-11-10T12:38:31.627777Z"}],"euvd":[{"id":"EUVD-2026-90589","description":"A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.","status":"published","published":"2026-10-01T09:17:43Z","modified":"2026-11-10T11:22:56Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-10T12:20:52.279403Z"}],"ghsa":[{"id":"GHSA-8c7h-7vm9-jhj3","title":"A flaw was found in oauth-proxy. The application fails to properly validate the destination...","description":"A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.","status":"published","published":"2026-10-01T12:31:15Z","modified":"2026-10-29T18:30:27Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T15:14:39.34849Z"}],"nvd":[{"id":"CVE-2026-83589","description":"A flaw was found in oauth-proxy. The application fails to properly validate the destination redirect parameter (`rd`) during post-login redirection. A remote attacker can exploit this vulnerability by enticing a user to follow a specially crafted link, resulting in the user being redirected to an arbitrary external website after authenticating. This open redirect can be leveraged to conduct phishing attacks or credential theft.","status":"published","published":"2026-10-01T10:17:17.217Z","modified":"2026-10-30T05:16:59.633Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:12:53.097633Z"}]}}