Siderolabs Omni up to 1.6.5/1.7.2 gRPC Backend schematics.go managementServer.CreateSchematic TalosVersion input validation

Summaryinfo

A vulnerability classified as problematic has been found in Siderolabs Omni up to 1.6.5/1.7.2. This issue affects the function managementServer.CreateSchematic of the file internal/backend/grpc/schematics.go of the component gRPC Backend. This manipulation of the argument TalosVersion causes input validation. This vulnerability appears as CVE-2026-45723. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Siderolabs Omni up to 1.6.5/1.7.2 and classified as problematic. Affected by this vulnerability is the function managementServer.CreateSchematic of the file internal/backend/grpc/schematics.go of the component gRPC Backend. The manipulation of the argument TalosVersion with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality. The summary by CVE is:

Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and 1.7.3, managementServer.CreateSchematic in internal/backend/grpc/schematics.go passes the caller-controlled TalosVersion field to imageFactoryClient.OverlaysVersions without validating it as a version. An authenticated Operator can submit traversal segments in TalosVersion, and url.URL.JoinPath normalizes them into unintended paths on the configured image-factory host. Omni then issues HTTP GET requests to those paths and reflects error-body content, enabling same-host endpoint probing and possible disclosure of internal diagnostics while preventing redirection to another host or write requests. This issue is fixed in versions 1.6.6 and 1.7.3.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-45723 since 05/13/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available.

Upgrading to version 1.6.6 or 1.7.3 eliminates this vulnerability.

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Productinfo

Vendor

• Siderolabs

Name

• Omni

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.7.0
• 1.7.1
• 1.7.2

Website

• Product: https://github.com/siderolabs/omni/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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