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CVE-2026-42965— Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation

CVSS 7.7 · High EPSS 0.03% · P9

Affected Version Matrix 2

VendorProductVersion RangeStatus
Red HatRed Hat OpenShift Container Platform 4anyaffected
anyaffected
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I. Basic Information for CVE-2026-42965

Vulnerability Information
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Vulnerability Title
Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in the OpenShift Router. A user with EndpointSlice write access can exploit this vulnerability by creating a Service backed by an FQDN (Fully Qualified Domain Name) EndpointSlice that resolves to a cloud metadata endpoint. This allows the router to proxy requests to the cloud metadata endpoint, leading to the disclosure of instance credentials and other sensitive metadata. This bypasses previous security measures for validating IP addresses.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat OpenShift Container Platform 4-cpe:/a:redhat:openshift:4
Red HatRed Hat OpenShift Container Platform 4-cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-42965

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III. Intelligence Information for CVE-2026-42965

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Vendor Advisories for CVE-2026-42965 (1)

Other References for CVE-2026-42965 (1)

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

CVE-2026-465797.4 HIGHOpenshift/router: openshift/router: mtls client certificate spoofing via unstripped x-ssl-
CVE-2026-101016.3 MEDIUMAssisted-service: assisted-service: infraenv status leaks referenced pull-secret contents
CVE-2026-63244.8 MEDIUMLibsoup: libsoup: http request smuggling via unsigned to signed conversion error
CVE-2026-100524.1 MEDIUMQuay/config-tool: quay/config-tool: ssrf via unfiltered ldap and smtp config validation en
CVE-2026-100782.7 LOWQuay/config-tool: quay/config-tool: gitlab oauth client_secret exposed in url querystring

IV. Related Vulnerabilities

Same product: Red Hat OpenShift Container Platform 4
Same vendor: Red Hat
Same weakness: CWE-918

V. Comments for CVE-2026-42965

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