Bug 2460269 (CVE-2026-40923) - CVE-2026-40923 github.com/tektoncd/pipeline: Tekton Pipelines: Unauthorized access and information disclosure via path validation bypass
Summary: CVE-2026-40923 github.com/tektoncd/pipeline: Tekton Pipelines: Unauthorized a...
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Status: NEW
Alias: CVE-2026-40923
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-21 21:01 UTC by OSIDB Bzimport
Modified: 2026-04-30 04:17 UTC (History)
159 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-04-21 21:01:20 UTC 
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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