{"id":"CVE-2026-105818","title":"Vault's PKI secrets engine ACME server did not restrict certificate identities that ACME challenges do not validate when issuing certificates under the default directory policy","summary":"Vault's PKI secrets engine ACME server did not restrict certificate identities that ACME challenges do not validate when issuing certificates under the default directory policy. This may allow an ACME client to obtain a certificate conta…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-345"],"vendor":"HashiCorp","product":"Vault","affected":["Vault >= 1.14.0 < 2.1.2","vault_enterprise >= 1.14.0 < 2.1.2"],"published":"2026-10-07","updated":"2026-10-07","sourceUpdated":"2026-10-07T22:17:02.843","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105818","references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-40-vault-pki-acme-default-directory-policy-may-issue-certificates-with-unverified-identities/77812","label":"security@hashicorp.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-07T21:54:15.105Z","slug":"CVE-2026-105818","body":"## Overview\n\nVault's PKI secrets engine ACME server did not restrict certificate identities that ACME challenges do not validate when issuing certificates under the default directory policy. This may allow an ACME client to obtain a certificate containing unverified identity claims, potentially enabling impersonation toward systems that trust certificates issued by the affected Vault PKI mount. This vulnerability (CVE-2026-105818) is fixed in Vault Community Edition 2.1.2, and Vault Enterprise 2.1.2, 1.21.12, 1.20.17, and 1.19.23.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}