{"id":"CVE-2026-93538","state":"PUBLISHED","title":"Cross-tenant BundleDeployment and Secret disclosure via spoofed cluster labels during agent-initiated registration in Fleet","description":"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.\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.","publishedAt":"2026-09-28T14:10:21.720Z","updatedAt":"2026-09-28T16:22:26.562Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","source":"suse"},"assigner":"suse","products":["SUSE Rancher"],"affected":[{"vendor":"SUSE","product":"Rancher","packageName":"Fleet","defaultStatus":"unaffected","versions":[{"version":"0.16.0","status":"affected","lessThan":"0.16.1","versionType":"semver"},{"version":"0.15.0","status":"affected","lessThan":"0.15.6","versionType":"semver"},{"version":"0.14.0","status":"affected","lessThan":"0.14.10","versionType":"semver"},{"version":"0.13.0","status":"affected","lessThan":"0.13.15","versionType":"semver"},{"version":"0.12.0","status":"affected","lessThan":"0.12.19","versionType":"semver"}],"repo":"https://github.com/rancher/fleet/"}],"references":["https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr"],"weaknesses":["CWE-290","CWE-639"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93538.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93538","state":"PUBLISHED","datePublished":"2026-09-28T14:10:21.720Z","dateUpdated":"2026-09-28T16:22:26.562Z","assignerShortName":"suse","assignerOrgId":"404e59f5-483d-4b8a-8e7a-e67604dd8afb","dateReserved":"2026-09-18T09:08:10.294Z"},"containers":{"cna":{"title":"Cross-tenant BundleDeployment and Secret disclosure via spoofed cluster labels during agent-initiated registration in Fleet","descriptions":[{"lang":"en","value":"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.\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."}],"affected":[{"vendor":"SUSE","product":"Rancher","packageName":"Fleet","defaultStatus":"unaffected","versions":[{"version":"0.16.0","status":"affected","lessThan":"0.16.1","versionType":"semver"},{"version":"0.15.0","status":"affected","lessThan":"0.15.6","versionType":"semver"},{"version":"0.14.0","status":"affected","lessThan":"0.14.10","versionType":"semver"},{"version":"0.13.0","status":"affected","lessThan":"0.13.15","versionType":"semver"},{"version":"0.12.0","status":"affected","lessThan":"0.12.19","versionType":"semver"}],"repo":"https://github.com/rancher/fleet/"}],"references":[{"url":"https://github.com/rancher/fleet/security/advisories/GHSA-h9p5-fp5h-qpqr","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseSeverity":"HIGH","baseScore":7.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-290","lang":"en","description":"CWE-290 Authentication bypass by spoofing","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639 Authorization bypass through User-Controlled key","type":"CWE"}]}],"providerMetadata":{"shortName":"suse","orgId":"404e59f5-483d-4b8a-8e7a-e67604dd8afb","dateUpdated":"2026-09-28T14:10:21.720Z"},"datePublic":"2026-09-28T14:05:00.000Z","impacts":[{"capecId":"CAPEC-122","descriptions":[{"lang":"en","value":"CAPEC-122 Privilege Abuse"}]},{"capecId":"CAPEC-195","descriptions":[{"lang":"en","value":"CAPEC-195 Principal Spoof"}]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*","versionStartIncluding":"0.16.0","versionEndExcluding":"0.16.1"},{"vulnerable":true,"criteria":"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*","versionStartIncluding":"0.15.0","versionEndExcluding":"0.15.6"},{"vulnerable":true,"criteria":"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*","versionStartIncluding":"0.14.0","versionEndExcluding":"0.14.10"},{"vulnerable":true,"criteria":"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*","versionStartIncluding":"0.13.0","versionEndExcluding":"0.13.15"},{"vulnerable":true,"criteria":"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*","versionStartIncluding":"0.12.0","versionEndExcluding":"0.12.19"}]}]}],"credits":[{"lang":"en","value":"https://github.com/Pig-Tail","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-93538","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-28T15:46:41.479078Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-28T16:22:26.562Z"}}]}}}