CVE-2026-42965
Openshift/router: openshift/router: cloud metadata ssrf via fqdn-typed endpointslice bypasses destination validation
- State
- Published
- Severity
- 7.7 High
- Published
- May 29, 2026
- Updated
- Oct 1, 2026
- Reserved
- May 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | redhat |
| 3.1 | 7.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N | redhat-SADP |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
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 |
|
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:54583vendor-advisory
- RHSA-2026:54602vendor-advisory
- RHSA-2026:54770vendor-advisory
- RHSA-2026:57408vendor-advisory
- RHSA-2026:65852vendor-advisory
- RHSA-2026:70587vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-42965vdb-entry
- RHBZ#2483184issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42965.json
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