{"id":"CVE-2026-83589","title":"A flaw was found in oauth-proxy","summary":"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 speciall…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-601"],"vendor":"Red Hat","product":"openshift4/ose-oauth-proxy-rhel9","affected":["openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy-rhel9 (all versions)","openshift4/ose-oauth-proxy (all versions)"],"patched":["openshift_container_platform 4.20","openshift_container_platform 4.21","openshift_container_platform 4.22"],"published":"2026-10-01","updated":"2026-10-15","sourceUpdated":"2026-10-15T06:17:05.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83589","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:74380","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:74383","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:74429","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:79169","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-83589","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2518379","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83589.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-83589"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83589"},{"url":"https://access.redhat.com/errata/RHSA-2026:79039","label":"RHSA-2026:79039"},{"url":"https://access.redhat.com/errata/RHSA-2026:82785","label":"RHSA-2026:82785"},{"url":"https://access.redhat.com/errata/RHSA-2026:82813","label":"RHSA-2026:82813"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00282,"epssPercentile":0.20636,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-01T16:11:43.615229Z"},"ingestedAt":"2026-10-01T09:41:14.165Z","slug":"CVE-2026-83589","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:74380** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.20 · released 2026-10-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:74380)\n- **RHSA-2026:74383** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.21 · released 2026-10-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:74383)\n- **RHSA-2026:74429** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-10-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:74429)\n- **Red Hat VEX** · Important · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83589.json)\n- **RHSA-2026:79169** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-10-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:79169)","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}