Riskcovery

CVE-2026-40923

Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check

State
Published
Severity
5.4 Medium
Published
Apr 21, 2026
Updated
May 22, 2026
Reserved
Apr 15, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.15.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NGitHub_M

Weaknesses

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

ProductVersions
pipelinetektoncd
  • >= 1.0.0, < 1.0.2Affected
  • >= 1.2.0, < 1.3.4Affected
  • >= 1.4.0, < 1.6.2Affected
  • >= 1.7.0, < 1.9.3Affected
  • >= 1.10.0, < 1.11.1Affected

References

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