CVE-2026-40923
MEDIUMTekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check
Title source: cnaDescription
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.
Scores
CVSS v3
5.4
EPSS
0.0004
EPSS Percentile
13.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-22
Status
published
Products (3)
linuxfoundation/tekton_pipelines
< 1.11.1
tektoncd/pipeline
0 - 1.11.1Go
tektoncd/pipeline
< 1.11.1
Published
Apr 21, 2026
Tracked Since
Apr 22, 2026