CVE-2026-55998
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| SUSE | Rancher | 2.14.0 < 2.14.4 | affected |
| SUSE | Rancher | 2.13.0 < 2.13.8 | affected |
| SUSE | Rancher | 2.12.0 < 2.12.12 | affected |
| SUSE | Rancher | 2.11.0 < 2.11.16 | affected |
Weaknesses
- CWE-204: CWE-204 Observable response discrepancy
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.