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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.21 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
References
- RHSA-2026:54583 vendor-advisory
- RHSA-2026:54602 vendor-advisory
- RHSA-2026:54770 vendor-advisory
- RHSA-2026:57408 vendor-advisory
- RHSA-2026:65852 vendor-advisory
- RHSA-2026:70587 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-42965 vdb-entry
- RHBZ#2483184 issue-tracking