CVE-2026-42965

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat OpenShift Container Platform 4.201786496552 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.211786498169 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.221786584196 < *unaffected

Weaknesses

  • CWE-918: Server-Side Request Forgery (SSRF)

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

openshift/router: openshift/router: cloud metadata SSRF via FQDN-typed EndpointSlice bypasses destination validation

Additional References

References