5.3

CVE-2026-55998

Cluster Existence Oracle via Unauthenticated Import Endpoint

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerSUSE
Produkt Rancher
Default Statusunaffected
Version 2.14.0
Version < 2.14.4
Status affected
Version 2.13.0
Version < 2.13.8
Status affected
Version 2.12.0
Version < 2.12.12
Status affected
Version 2.11.0
Version < 2.11.16
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.107
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
SUSE 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-204 Observable Response Discrepancy

The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.

https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998