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.
https://access.redhat.com/errata/RHSA-2026:47728
https://access.redhat.com/errata/RHSA-2026:47703
https://access.redhat.com/errata/RHSA-2026:43331
https://access.redhat.com/errata/RHSA-2026:43253
https://access.redhat.com/errata/RHSA-2026:43227
https://access.redhat.com/errata/RHSA-2026:40828
https://access.redhat.com/errata/RHSA-2026:40022
https://access.redhat.com/errata/RHSA-2026:37580
https://access.redhat.com/errata/RHSA-2026:27063