CVE-2026-55998

Published: Aug 5, 2026Modified: Sep 1, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitability: 3.9 / Impact: 1.4

Source: meissner@suse.de (Secondary)

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.

Related CWEs

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.

References (2)

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998

Source: meissner@suse.de

https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh

Source: meissner@suse.de

Timeline

No history available yet.