5.9
Medium
CVE-2026-105818 Vault's PKI secrets engine ACME server did not restrict certificate identities that ACME challenges do not validate when…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Vault 1.14 | 1.14.0 → < 2.1.2 | 2.1.2 |
| Vault Enterprise 1.14 | 1.14.0 → < 2.1.2 | 2.1.2 |
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