CVE-2026-49332 | A flaw was found in openshift/oauth-proxy. The proxy sets au… | CVSS 8.5 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-49332
State: PUBLISHED
Assigner: redhat
Reserved: 2026-05-29 13:28 UTC
Published: 2026-07-28 12:18 UTC
Last updated: 2026-07-28 13:03 UTC
Primary CWE: CWE-436
Interpretation Conflict
Vendor / Product: Red Hat / Red Hat OpenShift Container Platform 4
Sources: cve.org · NVD

Severity & Metrics

8.5 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (2)

Vendor	Product	Platform	Versions
Red Hat	Red Hat OpenShift Container Platform 4	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—

Weakness (CWE)

CWE	Source	Description
CWE-436	cna	Interpretation Conflict

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References (2)