CVE-2026-88808: A vulnerability has been identified within Rancher Manager where the Fleet agent wrote resources to downstream clusters using its own cluster-admin credentials…

PriorityP355high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

0.28%

19.2th percentile

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

6 ranges

Vendor	Product	Version range	Fixed in
suse	rancher	>= 0.14.0 < 0.14.11	0.14.11
suse	rancher	>= 0.15.0 < 0.15.7	0.15.7
suse	rancher	>= 0.16.0 < 0.16.2	0.16.2
suse	rancher_fleet	>= 0.14.0 < 0.14.11	0.14.11
suse	rancher_fleet	>= 0.15.0 < 0.15.7	0.15.7
suse	rancher_fleet	>= 0.16.0 < 0.16.2	0.16.2

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