CVE-2026-105820CWE-22path-traversal

CVE-2026-105820

Medium · published October 8, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
15.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00249 · 15.3th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-08T02:17Z
References (1)
https://discuss.hashicorp.com/t/hcsec-2026-42-vault-enterprise-acl-policy-cache-vulnerable-to-cross-namespace-policy-resolution/77814 · [email protected]
EPSS history
Timeline
  • 09 OCT 03:26Z
    EPSS moved — → 0%
    epss
  • 07 OCT 21:48Z
    Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution
    cvelistv5
  • 07 OCT 21:48Z
    Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution
    cvelistv5