CVSS 3.1
2.7 lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:NCVE-2026-45723
Low (2.7). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/siderolabs/omni 1.6.6, 1.7.3.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-20, CWE-22, CWE-209, CWE-441, CWE-918
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-c66c-vq6w-fvh5 | Go | github.com/siderolabs/omni | <1.6.6 | 1.6.6 |
| GHSA-c66c-vq6w-fvh5 | Go | github.com/siderolabs/omni | >=1.7.0 <1.7.3 | 1.7.3 |
| GO-2026-5316 | Go | github.com/siderolabs/omni | <1.6.6 >=1.7.0 <1.7.3 | 1.6.6, 1.7.3 |
References
- 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