CVE-2026-83589
Oauth-proxy: open redirect via /\ and /\t bypass in post-login redirect
CVSS Score
6.1
EPSS Score
0.2%
EPSS Percentile
15th
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.
| CWE | CWE-601 |
| Vendor | red hat |
| Product | red hat openshift container platform 4.18 |
| Published | Oct 1, 2026 |
| Last Updated | Oct 15, 2026 |
Stay Ahead of the Next One
Get instant alerts for red hat red hat openshift container platform 4.18
Be the first to know when new medium vulnerabilities affecting red hat red hat openshift container platform 4.18 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Red Hat / Red Hat OpenShift Container Platform 4.18
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.19
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.20
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.21
All versions affected Red Hat / Red Hat OpenShift Container Platform 4.22
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:74380 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:74383 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:74429 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:79039 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:79169 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-83589 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2518379