{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-105820",
        "assignerOrgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
        "state": "PUBLISHED",
        "assignerShortName": "HashiCorp",
        "dateReserved": "2026-10-05T21:35:14.384Z",
        "datePublished": "2026-10-07T21:48:08.017Z",
        "dateUpdated": "2026-10-07T21:48:08.017Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "64 bit",
                        "32 bit",
                        "x86",
                        "ARM",
                        "MacOS",
                        "Windows",
                        "Linux"
                    ],
                    "product": "Vault Enterprise",
                    "vendor": "HashiCorp",
                    "versions": [
                        {
                            "changes": [
                                {
                                    "at": "1.21.12",
                                    "status": "unaffected"
                                },
                                {
                                    "at": "1.20.17",
                                    "status": "unaffected"
                                },
                                {
                                    "at": "1.19.23",
                                    "status": "unaffected"
                                }
                            ],
                            "lessThan": "2.1.2",
                            "status": "affected",
                            "version": "0.0.1",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "This issue was identified by an external party."
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Vault's ACL policy cache allowed namespace traversal when policy names contained path traversal constructs. This may allow a token assigned specially crafted policy names to use the capabilities of policies defined in other namespaces, including the root namespace. This vulnerability (CVE-2026-105820) is fixed in Vault Enterprise 2.1.2, 1.21.12, 1.20.17, and 1.19.23. Vault Community Edition does not support namespaces, and is not affected.</p><br/>"
                        }
                    ],
                    "value": "Vault's ACL policy cache allowed namespace traversal when policy names contained path traversal constructs. This may allow a token assigned specially crafted policy names to use the capabilities of policies defined in other namespaces, including the root namespace. This vulnerability (CVE-2026-105820) is fixed in Vault Enterprise 2.1.2, 1.21.12, 1.20.17, and 1.19.23. Vault Community Edition does not support namespaces, and is not affected."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-126",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-126: Path Traversal"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "baseScore": 5.4,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
                        "version": "3.1"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
                "shortName": "HashiCorp",
                "dateUpdated": "2026-10-07T21:48:08.017Z"
            },
            "references": [
                {
                    "url": "https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814"
                }
            ],
            "source": {
                "advisory": "HCSEC-2026-42",
                "discovery": "EXTERNAL"
            },
            "title": "Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution"
        }
    }
}