{"schema":"threatline.record/2","record":{"id":"CVE-2026-105818","aliases":[],"summary":"Vault PKI ACME Issues Certificate With Unvalidated SANs","details":"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 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.","categories":["Unclassified"],"product":"Vault","vendor":"HashiCorp","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105818","source_modified_at":"2026-10-08T17:07:02.834Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Vault","vendor":"HashiCorp","versions":[{"lessThan":"2.1.2","status":"affected","version":"1.14.0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105818","source_modified_at":"2026-10-08T17:07:02.834Z","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":"1.14.0","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105818","source_modified_at":"2026-10-08T17:07:02.834Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Vault","ecosystem":null},"version":"2.1.2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105818","source_modified_at":"2026-10-08T17:07:02.834Z","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":5.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.0008,"percentile":0.00144,"score_date":"2026-10-23"},"published_at":"2026-10-07T21:21:05.675Z","modified_at":"2026-10-08T17:07:02.834Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105818","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-08T17:07:02.834Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105818","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-2026-40-vault-pki-acme-default-directory-policy-may-issue-certificates-with-unverified-identities/77812"}],"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":"2026-10-08T17:06:48.843203Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-08T17:07:02.834Z","content_hash":"92ba06ec0eb955a097b6584a71b193214fa2b56e6b38eab78d755567db1f2145"}}