CVE-2026-46579: A flaw was found in the OpenShift Router. When a Route has `insecureEdgeTerminationPolicy` set to Allow, the HTTP frontend does not remove `X-SSL-Client-*`…

PriorityP351high7.5CVSS 3.1

AVNACLPRNUINSUCNIHAN

EPSS

0.33%

25.5th percentile

A flaw was found in the OpenShift Router. When a Route has `insecureEdgeTerminationPolicy` set to Allow, the HTTP frontend does not remove `X-SSL-Client-*` headers from incoming requests. This allows an unauthenticated attacker to send plain HTTP requests with crafted `X-SSL-Client-*` headers. As a result, backends relying on these headers for mutual TLS (Transport Layer Security) authentication can be bypassed, enabling the attacker to impersonate client certificate identities.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
openshift4	ose-haproxy-router	—	—
openshift4	ose-haproxy-router-rhel9	—	—
redhat	openshift_container_platform	—	—

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

vendor_redhat7.4HIGH

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