{"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"}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "security@hashicorp.com"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-105820", "lastModified": "2026-10-07T22:17:02.990", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "security@hashicorp.com", "type": "Secondary"}]}, "published": "2026-10-07T22:17:02.990", "references": [{"source": "security@hashicorp.com", "url": "https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814"}], "sourceIdentifier": "security@hashicorp.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security@hashicorp.com", "type": "Secondary"}]}

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