Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Red Hat Red Hat OpenShift Container Platform 4.12 — Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N H N 7.5 .0035 28.5 —
AFFECTED
Product Versions Fixed
Red Hat OpenShift Container Platform 4.12 unspecified 1784323891
Red Hat OpenShift Container Platform 4.13 unspecified 1784056734
Red Hat OpenShift Container Platform 4.14 unspecified 1784587649
Red Hat OpenShift Container Platform 4.15 unspecified 1784580646
Red Hat OpenShift Container Platform 4.16 unspecified 1784331638
Red Hat OpenShift Container Platform 4.17 unspecified 1784321465
Red Hat OpenShift Container Platform 4.18 unspecified 1783719377
Red Hat OpenShift Container Platform 4.19 unspecified 1783445642
Red Hat OpenShift Container Platform 4.20 unspecified 1781639027
Red Hat OpenShift Container Platform 4.21 unspecified 1781552170
+ 1 more
TIMELINE
May 28 Reserved by redhat
May 29 Published (CNA: redhat)
Aug 17 RESCORED — CVE-2026-46579 (Red Hat OpenShift Container Platform 4.12). CVSS 7.4 → 7.5 (NVD).
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| May 28, 2026 | Reserved | Reserved by redhat |
| May 29, 2026 | Published | Published (CNA: redhat) |
| August 17, 2026 | RESCORED | RESCORED — CVE-2026-46579 (Red Hat OpenShift Container Platform 4.12). CVSS 7.4 → 7.5 (NVD). |
Affected
Affected products and packages — 11 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — | — | 1784323891 |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — | — | 1784056734 |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — | — | 1784587649 |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | — | 1784580646 |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — | — | 1784331638 |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — | — | 1784321465 |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — | — | 1783719377 |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — | — | 1783445642 |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — | — | 1781639027 |
| Red Hat | Red Hat OpenShift Container Platform 4.21 | — | — | 1781552170 |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | — | — | 1781643967 |
References (14)
- https://access.redhat.com/errata/RHSA-2026:27009 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:27044 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:27063 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:37580 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:40022 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:40828 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:43227 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:43253 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:43331 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:47703 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/errata/RHSA-2026:47728 [vendor-advisory, x_refsource_REDHAT]
- https://access.redhat.com/security/cve/CVE-2026-46579 [vdb-entry, x_refsource_REDHAT]
- https://bugzilla.redhat.com/show_bug.cgi?id=2483181 [issue-tracking, x_refsource_REDHAT]
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46579.json [x_sadp-csaf-vex]
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-46579 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.