CVE-2026-49332

A flaw was found in openshift/oauth-proxy. The proxy sets authenticated identity headers using only dash-variant keys (X-Forwarded-User) but does not strip underscore-variant keys (X_Forwarded_User) from incoming requests. WSGI and PHP frameworks normalize both variants to the same variable, allowing an authenticated low-privilege user to smuggle a forged identity that may override the legitimate authenticated identity in the upstream application.

Scoring

Severity

HIGH

CVSS base score

8.5

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS probability

0.30%

CWE

CWE-436

Published

2026-07-28

Last modified

2026-09-08

Affected products

• Red Hat Red Hat OpenShift Container Platform 4.21
• Red Hat Red Hat OpenShift Container Platform 4.20
• Red Hat Red Hat OpenShift Container Platform 4.22
• Red Hat Red Hat OpenShift Container Platform 4.18
• Red Hat Red Hat OpenShift Container Platform 4.19
• Red Hat Red Hat OpenShift Container Platform 4.14
• Red Hat Red Hat OpenShift Container Platform 4.16
• Red Hat Red Hat OpenShift Container Platform 4.2

Weakness type

• CWE-436

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