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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-55998

Cluster Existence Oracle via Unauthenticated Import Endpoint

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Status
Published
Published
Updated
Assigning organization
suse

Description

The endpoint /v3/import/{token}_{clusterId}.yaml retrieves the cluster object before validating the token. When a valid cluster ID references a cluster that has private registry secrets configured, a nil pointer dereference in pkg/systemtemplate/private_registry.go causes the request to return HTTP 502 Bad Gateway. For cluster IDs that do not exist, the endpoint returns HTTP 200. This observable difference in response codes constitutes a reliable enumeration oracle.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

SUSE Rancher

Default version status: unaffected

  • 2.14.0 to < 2.14.4affected
  • 2.13.0 to < 2.13.8affected
  • 2.12.0 to < 2.12.12affected
  • 2.11.0 to < 2.11.16affected

References