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Vendor Workaround
Upstream application hardening: validate X-Forwarded-User against the expected session identity. Reject requests where identity headers do not match the authenticated session.
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Tue, 28 Jul 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams | |
| First Time appeared |
Redhat
Redhat openshift |
|
| Weaknesses | CWE-436 | |
| CPEs | cpe:/a:redhat:openshift:4 | |
| Vendors & Products |
Redhat
Redhat openshift |
|
| References |
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| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-07-28T13:03:08.605Z
Reserved: 2026-05-29T13:28:56.553Z
Link: CVE-2026-49332
Updated: 2026-07-28T13:03:03.200Z
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OpenCVE Enrichment
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CWE-436
Interpretation Conflict