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CVE-2026-42965

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

At a glance

Severity
HIGH 7.7
EPSS
EPSS 0.40 % · percentile 34 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
redhat
NVD status
Modified

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

VersionScoreVectorScored by
CVSS 3.1HIGH 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nredhat
CVSS 3.1HIGH 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nredhat-SADP
CVSS 3.1HIGH 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NNVD · secalert@redhat.com (Secondary)
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NNVD · nvd@nist.gov (Primary)
CVSS 3.1HIGH 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Weaknesses (CWE)

European references

Affected configurations (NVD CPE)

Affected products

ProductVersions
Red Hat · Red Hat OpenShift Container Platform 4.17unaffected 1789938693 < *
Red Hat · Red Hat OpenShift Container Platform 4.18unaffected 1788578875 < *
Red Hat · Red Hat OpenShift Container Platform 4.19unaffected 1786771399 < *
Red Hat · Red Hat OpenShift Container Platform 4.20unaffected 1786496552 < *
Red Hat · Red Hat OpenShift Container Platform 4.21unaffected 1786498169 < *
Red Hat · Red Hat OpenShift Container Platform 4.22unaffected 1786584196 < *
Red Hat · Red Hat OpenShift Container Platform 4

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD