CVE-2026-55998

EUVD-2026-53258
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
suseCNA
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 10%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
suserancher
2.14.0 ≤
𝑥
< 2.14.4
CNA
suserancher
2.13.0 ≤
𝑥
< 2.13.8
CNA
suserancher
2.12.0 ≤
𝑥
< 2.12.12
CNA
suserancher
2.11.0 ≤
𝑥
< 2.11.16
CNA
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55998
https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh