CVE-2026-46579
Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend
- State
- Published
- Severity
- 7.4 High
- Published
- May 29, 2026
- Updated
- Sep 10, 2026
- Reserved
- May 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat-SADP |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
Red Hat OpenShift Container Platform 4.12Red Hat |
|
Red Hat OpenShift Container Platform 4.13Red Hat |
|
Red Hat OpenShift Container Platform 4.14Red Hat |
|
Red Hat OpenShift Container Platform 4.15Red Hat |
|
Red Hat OpenShift Container Platform 4.16Red Hat |
|
Red Hat OpenShift Container Platform 4.17Red Hat |
|
Red Hat OpenShift Container Platform 4.18Red Hat |
|
Red Hat OpenShift Container Platform 4.19Red Hat |
|
Red Hat OpenShift Container Platform 4.20Red Hat |
|
Red Hat OpenShift Container Platform 4.21Red Hat |
|
Red Hat OpenShift Container Platform 4.22Red Hat |
|
References
- RHSA-2026:27009vendor-advisory
- RHSA-2026:27044vendor-advisory
- RHSA-2026:27063vendor-advisory
- RHSA-2026:37580vendor-advisory
- RHSA-2026:40022vendor-advisory
- RHSA-2026:40828vendor-advisory
- RHSA-2026:43227vendor-advisory
- RHSA-2026:43253vendor-advisory
- RHSA-2026:43331vendor-advisory
- RHSA-2026:47703vendor-advisory
- RHSA-2026:47728vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-46579vdb-entry
- RHBZ#2483181issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46579.json
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.