CVE-2026-105818 — Vault PKI ACME Issues Certificate With Unvalidated SANs
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.…
Published: 2026-10-07 · CVSS: 5.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7