{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40923","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-15T20:40:15.517Z","datePublished":"2026-04-21T20:50:53.742Z","dateUpdated":"2026-04-22T13:51:13.268Z"},"containers":{"cna":{"title":"Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check","problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858"},{"name":"https://github.com/tektoncd/pipeline/releases/tag/v1.11.1","tags":["x_refsource_MISC"],"url":"https://github.com/tektoncd/pipeline/releases/tag/v1.11.1"}],"affected":[{"vendor":"tektoncd","product":"pipeline","versions":[{"version":"< 1.11.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-21T20:50:53.742Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-rx35-6rhx-7858","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T13:50:48.955785Z","id":"CVE-2026-40923","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-22T13:51:13.268Z"}}]}}