CVE-2026-40923

medium

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.

References

https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858

https://github.com/tektoncd/pipeline/releases/tag/v1.11.1

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-24481

Details

Source: Mitre, NVD

Published: 2026-04-21

Updated: 2026-04-27

Named Vulnerability: GO-2026-5643Named Vulnerability: GHSA-rx35-6rhx-7858

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00319