CVE-2026-40923

Summary

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.

Affected Software

VendorProductVersion RangeStatus
tektoncdpipeline>= 1.0.0, < 1.0.2affected
tektoncdpipeline>= 1.2.0, < 1.3.4affected
tektoncdpipeline>= 1.4.0, < 1.6.2affected
tektoncdpipeline>= 1.7.0, < 1.9.3affected
tektoncdpipeline>= 1.10.0, < 1.11.1affected

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References