CVE-2026-46579 – Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend

CVE ID :CVE-2026-46579

Published : May 29, 2026, 9:50 a.m. | 41 minutes ago

Description :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.

Severity: 7.4 | HIGH

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