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CVE-2026-88808
Published:September 28, 2026
Updated:October 10, 2026
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 Packages
https://github.com/rancher/fleet.git (GITHUB):
Affected version(s) >=v0.16.0 <v0.16.2
Fix Suggestion:
Update to version v0.16.2
https://github.com/rancher/fleet.git (GITHUB):
Affected version(s) >=v0.14.1-beta.1 <v0.14.11
Fix Suggestion:
Update to version v0.14.11
https://github.com/rancher/fleet.git (GITHUB):
Affected version(s) >=v0.15.0 <v0.15.7
Fix Suggestion:
Update to version v0.15.7
github.com/rancher/fleet (GO):
Affected version(s) >=v0.15.0 <v0.15.7
Fix Suggestion:
Update to version v0.15.7
github.com/rancher/fleet (GO):
Affected version(s) >=v0.14.1-beta.1 <v0.14.11
Fix Suggestion:
Update to version v0.14.11
github.com/rancher/fleet (GO):
Affected version(s) >=v0.16.0 <v0.16.2
Fix Suggestion:
Update to version v0.16.2
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Execution with Unnecessary Privileges
EPSS
Base Score:
0.28