Security Bulletin
Summary
Vault’s ACL policy engine did not consistently enforce a wildcard (glob) deny rule against LIST requests made with a trailing slash on the denied path. This may allow a token holding a broader allow rule alongside a narrower wildcard deny rule to enumerate the names of entries beneath a path it was intended to be denied access to. This vulnerability (CVE-2026-12624) is fixed in Vault Community Edition 2.0.3 and Vault Enterprise 2.0.3, 1.21.8, 1.20.13, and 1.19.19.
Vulnerability Details
CVEID: CVE-2026-12624
DESCRIPTION: When a LIST request was made against a denied path expressed with a trailing slash, the policy engine normalized the request path before performing its prefix lookup, causing it to match the broader allow rule instead of the more specific wildcard deny rule. As a result, a token could receive a LIST response enumerating entry names beneath a path it was intended to be denied. This issue requires an authenticated token that has already been granted a broad allow capability on a parent path together with a narrower wildcard deny rule; tokens without this specific policy combination are not affected. The issue was limited to disclosure of entry names via LIST; it did not disclose secret values and did not grant any capability beyond listing.
CWE: CWE-863: Incorrect Authorization
CVSS Source: HashiCorp Inc.
CVSS Base score: 4.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Vault Community Edition | affected from 2.0.0 up to 2.0.3 |
| Vault Enterprise | affected from 2.0.0 up to 2.0.3, unaffected from 1.21.8, 1.20.13, 1.19.19 |
Remediation/Fixes
Customers should evaluate the risk associated with this issue and upgrade to Vault 2.0.3 or Vault Enterprise 2.0.3, 1.21.8, 1.20.13, or 1.19.19.
Get Notified about Future Security Bulletins
References
Acknowledgement
This issue was reported to HashiCorp by Mike Cole of Redpath Security.
Change History
10 Aug 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
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Document Location
Worldwide
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Document Information
Modified date:
10 August 2026
Initial Publish date:
10 August 2026
UID
ibm17283160