What’s Vulnerable › Vulnerabilities
CVE-2026-88808: Fleet agent copies downstream resources with cluster-admin privileges, allowing cross-namespace writes on downstream clusters
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-28 · updated 2026-10-07
- Weakness: CWE-250
Description
A vulnerability has been identified within Rancher Manager where the Fleet agent wrote resources to downstream clusters using its own cluster-admin credentials instead of the ServiceAccount pinned to the deployment. It affects multi-tenancy environments where different tenants share the same downstream clusters, for example different privileged or untrusted teams inside the same organization. This could lead to overwritten configuration files. This issue affected SUSE Rancher Fleet 0.16 before 0.16.2, 0.15 before 0.15.7, and 0.14 before 0.14.11.
Affected products
- SUSE Fleet: from 0.14.0 before 0.14.11; from 0.15.0 before 0.15.7; from 0.16.0 before 0.16.2 — fixed in 0.14.11, 0.15.7, 0.16.2
How to fix
Upgrade to a fixed version: SUSE Fleet 0.14.11, 0.15.7, 0.16.2. Check the vendor advisory for mitigations.
References
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