CVE-2026-40923
Description
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, a validation bypass in the VolumeMount path restriction allows mounting volumes under restricted /tekton/ internal paths by using .. path traversal components. The restriction check uses strings.HasPrefix without filepath.Clean, so a path like /tekton/home/../results passes validation but resolves to /tekton/results at runtime. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.
How to fix
- linuxfoundation tekton_pipelines1.11.1 or later
- github.com/tektoncd/pipeline1.11.1, 1.9.3, 1.6.2, 1.3.4, 1.0.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation tekton_pipelines | v < 1.11.1 | 1.11.1 |
| github.com/tektoncd/pipelineGo | 1.10.0 ≤ v < 1.11.1, 1.7.0 ≤ v < 1.9.3, 1.4.0 ≤ v < 1.6.2, 1.2.0 ≤ v < 1.3.4, 1.0.0 ≤ v < 1.0.2, 1.1.0 ≤ v < 1.3.4 | 1.11.1, 1.9.3, 1.6.2, 1.3.4, 1.0.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.