CVE-2026-46579

Summary

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 Software

VendorProductVersion RangeStatus
Red HatRed Hat OpenShift Container Platform 4.201781639027 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.211781552170 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.221781643967 < *unaffected

Weaknesses

  • CWE-287: Improper Authentication

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

openshift/router: openshift/router: mTLS client certificate spoofing via unstripped X-SSL-Client headers on HTTP frontend

Additional References

References