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Vulnerability record · CVE-2026-45726 · published 17 September 2026

CVE-2026-45726: Information exposure vulnerability

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.

7.6 CVSS 3.1 High EPSS 0.14% · top 97.3% CWE-200 · Information exposureCWE-522 · Insufficiently protected credentials Deferred
7.6CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
24 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

References

LinkTags
https://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d
https://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8
https://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111
https://github.com/siderolabs/omni/pull/2807
https://github.com/siderolabs/omni/releases/tag/v1.6.6
https://github.com/siderolabs/omni/releases/tag/v1.7.3
https://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j

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Source: NIST National Vulnerability Database (record CVE-2026-45726), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.