Directory Traversal Affecting tekton-chains package, versions <0.26.3-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-TEKTONCHAINS-16134967
- published23 Apr 2026
- disclosed21 Apr 2026
Introduced: 21 Apr 2026
CVE-2026-40923 (opens in a new tab)How to fix?
Upgrade Chainguard tekton-chains to version 0.26.3-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tekton-chains package and not the tekton-chains package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
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.