---
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
affected:
  - openshift4/ose-oauth-proxy (all versions)
  - openshift4/ose-oauth-proxy-rhel9 (all versions)
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T10:17:17.217'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83589'
references:
  - 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
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T09:41:14.165Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.