{
    "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": "2026-05-22T15:41:51.388Z"
    },
    "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": ">= 1.0.0, < 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"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-05-22T15:41:51.388Z"
            },
            "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."
                }
            ],
            "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"
                }
            }
        ]
    }
}