CVE-2026-105820 — Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution

CVE-2026-105820

Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
HashiCorp / Vault Enterprise	affected 0.0.1 before 2.1.2

CWE

CWE-22

References

https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.