{"id":"CVE-2026-93538","title":"A cross-tenant authorization issue was discovered in SUSE Rancher 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","cwe":["CWE-290","CWE-639"],"vendor":"suse","product":"rancher_fleet","affected":["rancher_fleet >= 0.12.0, < 0.12.19","rancher_fleet >= 0.13.0, < 0.13.15","rancher_fleet >= 0.14.0, < 0.14.10","rancher_fleet >= 0.15.0, < 0.15.6","rancher_fleet >= 0.16.0, < 0.16.1"],"patched":["rancher_fleet 0.16.1"],"published":"2026-09-28","updated":"2026-10-07","sourceUpdated":"2026-10-07T17:13:37.180","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93538","references":[{"url":"https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr","label":"meissner@suse.de"}],"tags":["nvd","cve.org"],"epss":0.00171,"epssPercentile":0.0645,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T15:46:41.479078Z"},"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- `rancher_fleet >= 0.12.0, < 0.12.19`\n- `rancher_fleet >= 0.13.0, < 0.13.15`\n- `rancher_fleet >= 0.14.0, < 0.14.10`\n- `rancher_fleet >= 0.15.0, < 0.15.6`\n- `rancher_fleet >= 0.16.0, < 0.16.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `rancher_fleet 0.16.1`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}