MEDIUM 5.3 NVD
CVE-2026-55998
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
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.
References
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998
- https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-08-05 via NVD.
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