CVE-2026-40923
Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
14th
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.
| CWE | CWE-22 |
| Vendor | tektoncd |
| Product | pipeline |
| Published | Apr 21, 2026 |
| Last Updated | May 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
tektoncd / pipeline
>= 1.0.0, < 1.0.2 >= 1.2.0, < 1.3.4 >= 1.4.0, < 1.6.2 >= 1.7.0, < 1.9.3 >= 1.10.0, < 1.11.1