CVE-2026-105820Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution
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It affects HashiCorp Vault Enterprise. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- HashiCorp
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
HashiCorp Vault Enterprise hashicorp:vault_enterprise (from the name) | from 0.0.1 before 2.1.2; fixed at 1.21.12, fixed at 1.20.17, fixed at 1.19.23 | CNA record |
References
- https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.