CVE-2026-45726
Omni: Reader-level users can retrieve imported cluster CA keys via ResourceService
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.
INFO
Published Date :
Sept. 17, 2026, 8:16 p.m.
Last Modified :
Sept. 17, 2026, 8:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Omni to version 1.6.6 or later.
- Rotate cluster CA secrets immediately.
- Remove and re-import the cluster if secrets were exposed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45726.
CWE - Common Weakness Enumeration
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specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45726 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45726
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-45726 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45726 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Sep. 17, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:A/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Added CWE CWE-200 Added CWE CWE-522 Added CWE CWE-732 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/45xxx/CVE-2026-45726.json">CVE-2026-45726</a> Added Reference https://github.com/siderolabs/omni/commit/25fa9e141ee00285e70210ed40d11e4e457c871d Added Reference https://github.com/siderolabs/omni/commit/a224cb020f3aaca2bc21c3e32a38eb4a37e531e8 Added Reference https://github.com/siderolabs/omni/commit/b8ca100c4539ea83f0ac2e53dcd523e6e5b68111 Added Reference https://github.com/siderolabs/omni/pull/2807 Added Reference https://github.com/siderolabs/omni/releases/tag/v1.6.6 Added Reference https://github.com/siderolabs/omni/releases/tag/v1.7.3 Added Reference https://github.com/siderolabs/omni/security/advisories/GHSA-wv8c-6mx2-xf4j