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Kubernetes CVE-2026-40923

| EUVDEUVD-2026-24481 MEDIUM
Path Traversal (CWE-22)
2026-04-21 GitHub_M GHSA-rx35-6rhx-7858
Kubernetes Path Traversal Red Hat Suse
5.4
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
SUSE
MEDIUM
qualitative
Red Hat
5.4 MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Patch released
Apr 27, 2026 - 18:07 nvd
Patch available
Patch available
Apr 21, 2026 - 22:17 EUVD
EUVD ID Assigned
Apr 21, 2026 - 21:01 euvd
EUVD-2026-24481
CVE Published
Apr 21, 2026 - 20:50 nvd
MEDIUM 5.4

DescriptionGitHub Advisory

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.

Analysis

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.

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Vendor StatusVendor

SUSE

Severity: Medium

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CVE-2026-40923 vulnerability details – vuln.today
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