TI-2026-33462 Aliases CVE-2026-45723 GHSA-c66c-vq6w-fvh5

Omni: Operator can traverse image-factory API paths via unsanitized `talos_version` in CreateSchematic

LOW 14CWE-20Published 2026-09-17 · Updated 2026-09-18

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-209.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00494 42nd percentileScored 2026-11-07

Fix Fixed omni (siderolabs): 1.6.6, 1.7.3github.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: Partial

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	before 1.6.6; 1.7.0 to before 1.7.3	1.6.6, 1.7.3	Patch available	CNA
—	github.com/siderolabs/omni (Go)	before 1.6.6	1.6.6	Patch available	GHSA-c66c-vq6w-fvh5
—	github.com/siderolabs/omni (Go)	1.7.0 to before 1.7.3	1.7.3	Patch available	GHSA-c66c-vq6w-fvh5

omni Vendorsiderolabs Affected before 1.6.6; 1.7.0 to before 1.7.3 Fixed in 1.6.6, 1.7.3 Patch available CNA
github.com/siderolabs/omni (Go) Vendor— Affected before 1.6.6 Fixed in 1.6.6 Patch available GHSA-c66c-vq6w-fvh5
github.com/siderolabs/omni (Go) Vendor— Affected 1.7.0 to before 1.7.3 Fixed in 1.7.3 Patch available GHSA-c66c-vq6w-fvh5

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, 1.7.3
Fix · GHSA-c66c-vq6w-fvh5 github.com/siderolabs/omni (Go) Fixed in 1.6.6 Advisory →
Fix · GHSA-c66c-vq6w-fvh5 github.com/siderolabs/omni (Go) Fixed in 1.7.3 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-45723
2026-10-03 Alias added: GHSA-c66c-vq6w-fvh5

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-2026-33464 Omni: Reader-level users can retrieve imported cluster CA keys via ResourceService CVSS 3.1HIGH 7.6
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

See all 7 →

Sources

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