CVE-2026-42965 — HIGH (7.7)

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.

CVSS Score

7.7

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Redhat	Openshift Container Platform	4.0
Redhat	Openshift Router	-

Related Weaknesses (CWE)

CWE-918

References

FAQ

What is CVE-2026-42965?

CVE-2026-42965 is a vulnerability with a CVSS score of 7.7 (HIGH). 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...

How severe is CVE-2026-42965?

CVE-2026-42965 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42965?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Openshift Container Platform, Redhat Openshift Router.