{"id":"CVE-2026-105820","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-105820","generatedAt":"2026-10-28T01:11:35.848Z","title":"Vault's ACL policy cache allowed namespace traversal when policy names contained path traversal constructs.","description":"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.","published":"2026-10-07T22:17:03.000Z","lastModified":"2026-10-08T21:07:57.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@hashicorp.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-22"],"affected":[],"epss":{"score":0.00249,"percentile":0.16111,"date":"2026-10-26","history":[{"date":"2026-10-08","score":0.00249,"percentile":0.14891}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-07T22:17:03.000Z","detail":{"score":"5.4","severity":"MEDIUM","publishedAt":"2026-10-07T22:17:02.990Z"},"summary":"New CVE, medium severity (CVSS 5.4)."}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814","source":"security@hashicorp.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105820","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}