{"id":"CVE-2026-40923","sourceIdentifier":"security-advisories@github.com","published":"2026-04-21T21:16:45.543","lastModified":"2026-06-17T10:45:53.443","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"tektoncd","product":"pipeline","versions":[{"version":">= 1.0.0, < 1.0.2","status":"affected"},{"version":">= 1.2.0, < 1.3.4","status":"affected"},{"version":">= 1.4.0, < 1.6.2","status":"affected"},{"version":">= 1.7.0, < 1.9.3","status":"affected"},{"version":">= 1.10.0, < 1.11.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-22T13:50:48.955785Z","id":"CVE-2026-40923","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-22"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:*","versionEndExcluding":"1.11.1","matchCriteriaId":"CC2C0633-AA1A-4CB5-8FA4-CD63381DCE11"}]}]}],"references":[{"url":"https://github.com/tektoncd/pipeline/releases/tag/v1.11.1","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}