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.
References10
- access.redhat.com/errata/RHSA-2026:74380
- access.redhat.com/errata/RHSA-2026:74383
- access.redhat.com/errata/RHSA-2026:74429
- access.redhat.com/errata/RHSA-2026:79039
- access.redhat.com/errata/RHSA-2026:79169
- access.redhat.com/errata/RHSA-2026:82785
- access.redhat.com/errata/RHSA-2026:82813
- access.redhat.com/errata/RHSA-2026:89715
- access.redhat.com/errata/RHSA-2026:90274
- access.redhat.com/security/cve/CVE-2026-83589
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 33 · as of 10 November 2026
- CWE
- CWE-601
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.