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CVE-2026-45726
Published:September 17, 2026
Updated:September 22, 2026
Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. From 1.3.0 until 1.6.6 and 1.7.3, importing a standalone Talos cluster creates an ImportedClusterSecrets resource containing the cluster's complete CA secrets bundle. The access rules in internal/backend/runtime/omni/state_access.go allow an authenticated user with the Reader role to retrieve the resource through ResourceService if the importing actor has not rotated those secrets, exposing Kubernetes, Talos, and etcd CA private keys plus the service-account key. The Kubernetes CA private key permits certificate signing for privileged identities such as system:masters and provides control of the imported cluster outside Omni's authorization boundary, including its workloads, credentials, and secrets. This issue is fixed in versions 1.6.6 and 1.7.3.
Affected Packages
https://github.com/siderolabs/omni.git (GITHUB):
Affected version(s) >=v1.3.0 <v1.6.6
Fix Suggestion:
Update to version v1.6.6
https://github.com/siderolabs/omni.git (GITHUB):
Affected version(s) >=v1.7.0 <v1.7.3
Fix Suggestion:
Update to version v1.7.3
github.com/siderolabs/omni (GO):
Affected version(s) >=v1.3.0 <v1.6.6
Fix Suggestion:
Update to version v1.6.6
github.com/siderolabs/omni (GO):
Affected version(s) >=v1.7.0 <v1.7.3
Fix Suggestion:
Update to version v1.7.3
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CVSS v4
Base Score:
7.3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
7.6
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Incorrect Permission Assignment for Critical Resource
Insufficiently Protected Credentials
Exposure of Sensitive Information to an Unauthorized Actor
EPSS
Base Score:
0.10