CVE-2026-83589
Oauth-proxy: open redirect via /\ and /\t bypass in post-login redirect
MEDIUM 6.1
At a glance
- Source
- NVD
- EPSS
- EPSS 0.28 % · percentile 21 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Awaiting Analysis
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.
Weaknesses (CWE)
- CWE-601 — URL Redirection to Untrusted Site
References
- https://access.redhat.com/errata/RHSA-2026:74380
- https://access.redhat.com/errata/RHSA-2026:74383
- https://access.redhat.com/errata/RHSA-2026:74429
- https://access.redhat.com/errata/RHSA-2026:79039
- https://access.redhat.com/errata/RHSA-2026:79169
- https://access.redhat.com/errata/RHSA-2026:82785
- https://access.redhat.com/errata/RHSA-2026:82813
- https://access.redhat.com/errata/RHSA-2026:89715
- https://access.redhat.com/errata/RHSA-2026:90274
- https://access.redhat.com/security/cve/CVE-2026-83589
- https://bugzilla.redhat.com/show_bug.cgi?id=2518379
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | redhat |
| CVSS 3.1 | MEDIUM 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | NVD · secalert@redhat.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-90589
- GCVE · GCVE-0-2026-83589
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat OpenShift Container Platform 4.12 | unaffected 1792974337 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.14 | unaffected 1791837363 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.15 | unaffected 1791632336 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.16 | unaffected 1792878232 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.18 | unaffected 1790882320 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.19 | unaffected 1790807096 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.20 | unaffected 1790704224 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.21 | unaffected 1790706478 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.22 | unaffected 1790724885 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |