Cross-tenant BundleDeployment and Secret disclosure via spoofed cluster labels during agent-initiated registration in Fleet
A cross-tenant authorization issue was discovered in SUSE Rancher Fleet. During agent-initiated cluster registration, cluster labels supplied by the registering agent, including labels in the reserved management.cattle.io/ namespace such as the cluster display name label, were applied to the resulting upstream Cluster object. Because Fleet resolves GitRepo and Bundle targets from those cluster labels, a party able to register a cluster into a Fleet workspace namespace shared with other tenants could cause its own cluster to satisfy targeting rules that administrators intended for a different cluster. This affects SUSE Rancher Fleet 0.16 before 0.16.1, 0.15 before 0.15.6, 0.14 before 0.14.10, 0.13 before 0.13.15, 0.12 before 0.12.19 and older versions.
CVE-2026-93538
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93538
Rancher
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/rancher/fleet/",
"vendor": "SUSE",
"product": "Rancher",
"versions": [
{
"status": "affected",
"version": "0.16.0",
"lessThan": "0.16.1",
"versionType": "semver"
},
{
"status": "affected",
"version": "0.15.0",
"lessThan": "0.15.6",
"versionType": "semver"
},
{
"status": "affected",
"version": "0.14.0",
"lessThan": "0.14.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "0.13.0",
"lessThan": "0.13.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "0.12.0",
"lessThan": "0.12.19",
"versionType": "semver"
}
],
"packageName": "Fleet",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-93538
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #3190 · Revision 1
- Added to Heist Feed
- Publisher date