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. 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.
CVE-2026-105818
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-105818
Vault
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Vault Enterprise
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/hashicorp/vault",
"vendor": "HashiCorp",
"product": "Vault",
"versions": [
{
"status": "affected",
"version": "1.14.0",
"lessThan": "2.1.2",
"versionType": "semver"
}
],
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://github.com/hashicorp/vault",
"vendor": "HashiCorp",
"product": "Vault Enterprise",
"versions": [
{
"status": "affected",
"changes": [
{
"at": "1.21.12",
"status": "unaffected"
},
{
"at": "1.20.17",
"status": "unaffected"
},
{
"at": "1.19.23",
"status": "unaffected"
}
],
"version": "1.14.0",
"lessThan": "2.1.2",
"versionType": "semver"
}
],
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-105818
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #13042 · Revision 1
- Added to Heist Feed
- Publisher date