Auth bypass in Red Hat Openshift Container Platform 4
CVE-2026-46579
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Red Hat Openshift Container Platform 4
- Red Hat Openshift Container Platform 4.12 — versions 1784323891
- Red Hat Openshift Container Platform 4.13 — versions 1784056734
- Red Hat Openshift Container Platform 4.14 — versions 1784587649
- Red Hat Openshift Container Platform 4.15 — versions 1784580646
- Red Hat Openshift Container Platform 4.16 — versions 1784331638
- Red Hat Openshift Container Platform 4.17 — versions 1784321465
- Red Hat Openshift Container Platform 4.18 — versions 1783719377
- Red Hat Openshift Container Platform 4.19 — versions 1783445642
- Red Hat Openshift Container Platform 4.2 — versions 1781639027
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-46579 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:27044 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:27063 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:27009 (vendor-advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- access.redhat.com/errata/RHSA-2026:37580 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:40828 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:40022 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:43227 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-46579?
- CVE-2026-46579 is a high-severity vulnerability in Red Hat Openshift Container Platform 4, classified under Improper Authentication. CVSS score: 7.4/10. Published 2026-05-29.
- How severe is CVE-2026-46579?
- High severity. CVSS v3 base score is 7.4 out of 10.