{"id":"CVE-2026-93538","title":"Cross-tenant BundleDeployment and Secret disclosure via spoofed cluster labels during agent-initiated registration in Fleet","summary":"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…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","cvssSource":"cna","cwe":["CWE-290","CWE-639"],"vendor":"SUSE","product":"Fleet","affected":["Fleet >= 0.16.0 < 0.16.1","Fleet >= 0.15.0 < 0.15.6","Fleet >= 0.14.0 < 0.14.10","Fleet >= 0.13.0 < 0.13.15","Fleet >= 0.12.0 < 0.12.19"],"published":"2026-09-28","updated":"2026-09-28","sourceUpdated":"2026-09-28T14:10:21.720Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93538","references":[{"url":"https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr"}],"tags":["cve.org"],"ingestedAt":"2026-09-28T15:13:31.606Z","slug":"CVE-2026-93538","body":"## Overview\n\nA 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.\nThis 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.\n\n## Affected\n\n- `Fleet >= 0.16.0 < 0.16.1`\n- `Fleet >= 0.15.0 < 0.15.6`\n- `Fleet >= 0.14.0 < 0.14.10`\n- `Fleet >= 0.13.0 < 0.13.15`\n- `Fleet >= 0.12.0 < 0.12.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}