{"schema":"threatline.record/2","record":{"id":"CVE-2026-105820","aliases":[],"summary":"Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution","details":"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.","categories":["Unclassified"],"product":"Vault Enterprise","vendor":"HashiCorp","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105820","source_modified_at":"2026-10-08T17:06:15.663Z","fetched_at":"2026-10-23T18:48:36.087640Z","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"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105820","source_modified_at":"2026-10-08T17:06:15.663Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Vault Enterprise","ecosystem":null},"version":"2.1.2","basis":"first unaffected version stated in the CVE record"}],"cvss":5.4,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00249,"percentile":0.15343,"score_date":"2026-10-23"},"published_at":"2026-10-07T21:48:08.017Z","modified_at":"2026-10-08T17:06:15.663Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105820","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-08T17:06:15.663Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105820","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-08T17:05:54.369098Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-08T17:06:15.663Z","content_hash":"187ce35b97a1d6a8f797245de6eda149d8131bbfffa11c78284d15962fd0efad"}}