CVE-2026-46579
Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend
HIGH 7.4
At a glance
- Source
- NVD
- EPSS
- EPSS 0.45 % · percentile 39 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-287 — Improper Authentication
References
- https://access.redhat.com/errata/RHSA-2026:27009
- https://access.redhat.com/errata/RHSA-2026:27044
- https://access.redhat.com/errata/RHSA-2026:27063
- https://access.redhat.com/errata/RHSA-2026:37580
- https://access.redhat.com/errata/RHSA-2026:40022
- https://access.redhat.com/errata/RHSA-2026:40828
- https://access.redhat.com/errata/RHSA-2026:43227
- https://access.redhat.com/errata/RHSA-2026:43253
- https://access.redhat.com/errata/RHSA-2026:43331
- https://access.redhat.com/errata/RHSA-2026:47703
- https://access.redhat.com/errata/RHSA-2026:47728
- https://access.redhat.com/security/cve/CVE-2026-46579
- https://bugzilla.redhat.com/show_bug.cgi?id=2483181
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46579.json
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat |
| CVSS 3.1 | HIGH 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat-SADP |
| CVSS 3.1 | HIGH 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
European references
- ENISA EUVD · EUVD-2026-33274
- GCVE · GCVE-0-2026-46579
Affected configurations (NVD CPE)
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_router:-:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat OpenShift Container Platform 4.12 | unaffected 1784323891 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.13 | unaffected 1784056734 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.14 | unaffected 1784587649 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.15 | unaffected 1784580646 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.16 | unaffected 1784331638 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.17 | unaffected 1784321465 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.18 | unaffected 1783719377 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.19 | unaffected 1783445642 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.20 | unaffected 1781639027 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.21 | unaffected 1781552170 < * |
| Red Hat · Red Hat OpenShift Container Platform 4.22 | unaffected 1781643967 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |