CVE-2026-42965
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.
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- redhat/openshift container platform · redhat/openshift router
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:54583
- https://access.redhat.com/errata/RHSA-2026:54602
- https://access.redhat.com/errata/RHSA-2026:54770
- https://access.redhat.com/errata/RHSA-2026:57408
- https://access.redhat.com/security/cve/CVE-2026-42965Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2483184Issue Tracking, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:54583
- https://access.redhat.com/errata/RHSA-2026:54602
- https://access.redhat.com/errata/RHSA-2026:54770
- https://access.redhat.com/errata/RHSA-2026:57408
- https://access.redhat.com/security/cve/CVE-2026-42965Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2483184Issue Tracking, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42965.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.