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CVE-2026-46579— Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend

Quick assessment

Affected
Red Hat Red Hat OpenShift Container Platform 4.12
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat OpenShift Container Platform是美国红帽（Red Hat）公司的一套可帮助企业在物理、虚拟和公共云基础架构之间开发、部署和管理现有基于容器的应用程序的应用平台。 Red Hat OpenShift Container Platform存在授权问题漏洞，该漏洞源于当Route的insecureEdgeTerminationPolicy设置为Allow时，HTTP前端未从传入请求中移除X-SSL-Client-*标头，可能导致未经身份验证的攻击者发送带有特制X-SSL

CVSS 7.4 · High EPSS 0.62% · P48

Affected Version Matrix 11

VendorProduct Version RangeStatus
Red Hat Red Hat OpenShift Container Platform 4.12 1784323891< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.13 1784056734< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.14 1784587649< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.15 1784580646< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.16 1784331638< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.17 1784321465< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.18 1783719377< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.19 1783445642< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.20 1781639027< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.21 1781552170< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.22 1781643967< * unaffected
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I. Basic Information for CVE-2026-46579

Vulnerability Information
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Vulnerability Title
Openshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-client headers on http frontend
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat OpenShift Container Platform 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat OpenShift Container Platform是美国红帽（Red Hat）公司的一套可帮助企业在物理、虚拟和公共云基础架构之间开发、部署和管理现有基于容器的应用程序的应用平台。 Red Hat OpenShift Container Platform存在授权问题漏洞，该漏洞源于当Route的insecureEdgeTerminationPolicy设置为Allow时，HTTP前端未从传入请求中移除X-SSL-Client-*标头，可能导致未经身份验证的攻击者发送带有特制X-SSL
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat OpenShift Container Platform 4.12 1784323891 ~ * cpe:/a:redhat:openshift:4.12::el9
Red Hat Red Hat OpenShift Container Platform 4.13 1784056734 ~ * cpe:/a:redhat:openshift:4.13::el9
Red Hat Red Hat OpenShift Container Platform 4.14 1784587649 ~ * cpe:/a:redhat:openshift:4.14::el9
Red Hat Red Hat OpenShift Container Platform 4.15 1784580646 ~ * cpe:/a:redhat:openshift:4.15::el9
Red Hat Red Hat OpenShift Container Platform 4.16 1784331638 ~ * cpe:/a:redhat:openshift:4.16::el9
Red Hat Red Hat OpenShift Container Platform 4.17 1784321465 ~ * cpe:/a:redhat:openshift:4.17::el9
Red Hat Red Hat OpenShift Container Platform 4.18 1783719377 ~ * cpe:/a:redhat:openshift:4.18::el9
Red Hat Red Hat OpenShift Container Platform 4.19 1783445642 ~ * cpe:/a:redhat:openshift:4.19::el9
Red Hat Red Hat OpenShift Container Platform 4.20 1781639027 ~ * cpe:/a:redhat:openshift:4.20::el9
Red Hat Red Hat OpenShift Container Platform 4.21 1781552170 ~ * cpe:/a:redhat:openshift:4.21::el9
Red Hat Red Hat OpenShift Container Platform 4.22 1781643967 ~ * cpe:/a:redhat:openshift:4.22::el9

II. Public POCs for CVE-2026-46579

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III. Intelligence Information for CVE-2026-46579

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Vendor Advisories for CVE-2026-46579 (8)

Other References for CVE-2026-46579 (3)

Same Patch Batch · Red Hat · 2026-05-29 · 6 CVEs total

CVE-2026-42965 7.7 HIGH Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypas
CVE-2026-10101 6.3 MEDIUM Assisted-service: assisted-service: infraenv status leaks referenced pull-secret contents
CVE-2026-6324 4.8 MEDIUM Libsoup: libsoup: http request smuggling via unsigned to signed conversion error
CVE-2026-10052 4.1 MEDIUM Quay/config-tool: quay/config-tool: ssrf via unfiltered ldap and smtp config validation en
CVE-2026-10078 2.7 LOW Quay/config-tool: quay/config-tool: gitlab oauth client_secret exposed in url querystring

IV. Related Vulnerabilities

Same product: Red Hat OpenShift Container Platform 4.12
Same vendor: Red Hat
Same weakness: CWE-287

V. Comments for CVE-2026-46579

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