CVE-2026-49332
Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:LPrivileges RequiredLow
UI:NUser InteractionNone
Scope
S:CScopeChanged
Impact
C:HConfidentialityHigh
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
Red Hat
commercial·US
and 3 more affected products View all →
Exploitability
Workaround Available
References
https://access.redhat.com/errata/RHSA-2026:50681
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:50758
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:51007
access.redhat.com
and 10 more references View all →
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