High 7.7Published May 29, 2026

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

Updated under an hour ago (Oct 26, 2026, 7:10 PM ET)

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It affects Red Hat OpenShift Container Platform 4.17 and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat OpenShift Container Platform 4.17

Exploited in the last 30 days

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.

CVSS: 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat OpenShift Container Platform 4.17 redhat:openshift	from 1789938693 not affected	CNA record
Red Hat Red Hat OpenShift Container Platform 4.19 redhat:openshift	from 1786771399 not affected	CISA ADP
redhat openshift_container_platform redhat:openshift_container_platform	4.0	NVD
redhat openshift_router redhat:openshift_router	all versions	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:54583	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:54602	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:54770	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:57408	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:65852	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:70587	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-42965	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2483184	issue-tracking, x-refsource-redhat, vendor-advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42965.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.