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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00045.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
tektoncd pipeline affected
Version Status Constraints
>= 1.0.0, < 1.0.2 affected —
>= 1.2.0, < 1.3.4 affected —
>= 1.4.0, < 1.6.2 affected —
>= 1.7.0, < 1.9.3 affected —
>= 1.10.0, < 1.11.1 affected —

Configuration 1 [-]

cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*

No data.

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Vendors Products
Tektoncd Subscribe
Pipeline Subscribe

Project Subscriptions

Vendors Products
Linuxfoundation Subscribe
Tekton Pipelines Subscribe
Tektoncd Subscribe
Pipeline Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-rx35-6rhx-7858 Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/tektoncd/pipeline/releases/tag/v1.11.1 cve-icon cve-icon cve-icon
https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-40923 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-40923 cve-icon
History

Fri, 22 May 2026 16:30:00 +0000

Type Values Removed Values Added
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. 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.

Tue, 28 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-179
References
Metrics threat_severity

None

 threat_severity

Moderate

Mon, 27 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation tekton Pipelines
CPEs cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*
Vendors & Products Linuxfoundation
Linuxfoundation tekton Pipelines

Wed, 22 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 22 Apr 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Tektoncd
Tektoncd pipeline
Vendors & Products Tektoncd
Tektoncd pipeline

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-22T15:41:51.388Z

Reserved: 2026-04-15T20:40:15.517Z

Link: CVE-2026-40923

cve-icon Vulnrichment

Updated: 2026-04-22T13:51:03.320Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-21T21:16:45.543

Modified: 2026-04-27T18:07:23.070

Link: CVE-2026-40923

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-21T20:50:53Z

Links: CVE-2026-40923 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-22T17:30:06Z

Weaknesses