TI-2026-33464 Aliases CVE-2026-45726 GHSA-wv8c-6mx2-xf4j

Omni: Reader-level users can retrieve imported cluster CA keys via ResourceService

LOW 34CWE-200Published 2026-09-17 · Updated 2026-09-21

Key facts

Attack vector: Adjacent network
Privileges required: Low
User interaction: Required
Attack complexity: High
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00139 3rd percentileScored 2026-11-07

Fix Fixed omni (siderolabs): 1.6.6github.com/siderolabs/omni (Go): 1.6.6, 1.7.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
siderolabs	omni	1.3.0 to before 1.6.6	1.6.6	Patch available	CNA
—	github.com/siderolabs/omni (Go)	1.3.0 to before 1.6.6	1.6.6	Patch available	GHSA-wv8c-6mx2-xf4j
—	github.com/siderolabs/omni (Go)	1.7.0 to before 1.7.3	1.7.3	Patch available	GHSA-wv8c-6mx2-xf4j

omni Vendorsiderolabs Affected 1.3.0 to before 1.6.6 Fixed in 1.6.6 Patch available CNA
github.com/siderolabs/omni (Go) Vendor— Affected 1.3.0 to before 1.6.6 Fixed in 1.6.6 Patch available GHSA-wv8c-6mx2-xf4j
github.com/siderolabs/omni (Go) Vendor— Affected 1.7.0 to before 1.7.3 Fixed in 1.7.3 Patch available GHSA-wv8c-6mx2-xf4j

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:siderolabs:omni::::::::	—	—	siderolabs

cpe:2.3:a:siderolabs:omni:*:*:*:*:*:*:*:* Versions — — ·siderolabs

Remediation

Fix · CNA omni (siderolabs) Fixed in 1.6.6
Fix · GHSA-wv8c-6mx2-xf4j github.com/siderolabs/omni (Go) Fixed in 1.6.6 Advisory →
Fix · GHSA-wv8c-6mx2-xf4j github.com/siderolabs/omni (Go) Fixed in 1.7.3 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-45726
2026-10-03 Alias added: GHSA-wv8c-6mx2-xf4j

References

Other 8

TI-2025-37275 Omni is Vulnerable to DoS via Empty Create/Update Resource Requests CVSS 3.1HIGH 7.5
TI-2025-38119 Omni leaks information via the API CVSS 3.1HIGH 8.6
TI-2022-16526 Talos worker join token can be used to get elevated access level to the Talos API CVSS 3.1HIGH 8.8
TI-2026-33459 Omni: TOCTOU race condition allows multiple concurrent uses of a single-use SAML session token CVSS 3.1HIGH 7.0
TI-2026-74326 Talos Linux support bundles include unredacted registry credentials CVSS 3.1LOW 3.3
TI-2026-33462 Omni: Operator can traverse image-factory API paths via unsanitized `talos_version` in CreateSchematic CVSS 3.1LOW 2.7

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences