← CVE Intelligence

CVE-2026-42965

Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Red Hat / Red Hat OpenShift Container Platform 4.17unaffected 1789938693 before *
Red Hat / Red Hat OpenShift Container Platform 4.18unaffected 1788578875 before *
Red Hat / Red Hat OpenShift Container Platform 4.19unaffected 1786771399 before *
Red Hat / Red Hat OpenShift Container Platform 4.20unaffected 1786496552 before *
Red Hat / Red Hat OpenShift Container Platform 4.21unaffected 1786498169 before *
Red Hat / Red Hat OpenShift Container Platform 4.22unaffected 1786584196 before *
Red Hat / Red Hat OpenShift Container Platform 4affected

CWE

CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

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.