Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution
Vault's ACL policy cache allowed namespace traversal when policy names contained path traversal constructs. This may allow a token assigned specially crafted policy names to use the capabilities of policies defined in other namespaces, including the root namespace. This vulnerability (CVE-2026-105820) is fixed in Vault Enterprise 2.1.2, 1.21.12, 1.20.17, and 1.19.23. Vault Community Edition does not support namespaces, and is not affected.
CVE-2026-105820
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-2026-105820
Vault Enterprise
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
Structured affected-version data
Original package identities and version rules from this source.
[
{
"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": "0.0.1",
"lessThan": "2.1.2",
"versionType": "semver"
}
],
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-105820
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #13039 · Revision 1
- Added to Heist Feed
- Publisher date