# CVE-2026-40923

> Vulnerability · severity: **MEDIUM** (CVSS 5.4).

## Description

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Prior to 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. This vulnerability is fixed in 1.11.1.

## Key facts

- **CVE ID:** CVE-2026-40923
- **Published:** 2026-04-21
- **CVSS severity:** MEDIUM
- **CVSS base score:** 5.4
- **CWE codes:** CWE-22

## Affected products

- `linuxfoundation:tekton_pipelines`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40923

## Citation

> AI Analytics. CVE-2026-40923. Retrieved 2026-07-12 from https://api.ai-analytics.org/cve/CVE-2026-40923. Derived from NIST NVD. Licensed CC0.

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