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CVE-2026-46579

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

Published: May 29, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-287
7.4HIGH
NVD MITRE
EPSS Score
0.3%
Top 74.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-287NVD-CWE-noinfo

Affected Products

Red Hat
commercial·USaka redhat
openshift container platformOn-prem
Operating Systems / linux-distro
openshift routerOn-prem
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4.13SaaSSaaS Service
Cloud & SaaS / container-orchestration
Red Hat OpenShift Container Platform 4.18On-premSaaS Service
Cloud & SaaS / container-orchestration
Red Hat OpenShift Container Platform 4.19MixedSaaS Service
Cloud & SaaS / container-orchestration
Red Hat OpenShift Container Platform 4.20SaaSSaaS Service
Cloud & SaaS / container-orchestration
Red Hat OpenShift Container Platform 4.21On-prem
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4.22MixedSaaS Service
Cloud & SaaS / container-orchestration

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:27009
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:27044
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:27063
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and 6 more references View all →

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