CVE-2026-45723

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.

• https://github.com/siderolabs/omni/commit/13c3f289789842e1fd954d98babb34b94eea1192
• https://github.com/siderolabs/omni/commit/3e69e80802624bf322f16aa499d5eafca16d0025
• https://github.com/siderolabs/omni/commit/9426c2cabccaa1d442bc8ebf28c16cae2d7c6ff7
• https://github.com/siderolabs/omni/pull/2817
• 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-c66c-vq6w-fvh5