CVE-2026-12624
Received Received - Intake

ACL Policy Bypass in Vault via Trailing Slash in LIST Requests

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: HashiCorp Inc.

Description
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.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-12624
EUVD
EUVD-2026-55677

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
hashicorp vault 2.0.3
hashicorp vault 1.21.8
hashicorp vault 1.20.13
hashicorp vault 1.19.19

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

Vault’s ACL policy engine had an issue where a wildcard deny rule for LIST requests was not consistently enforced when the denied path had a trailing slash. This could allow a token with a broader allow rule and a narrower wildcard deny rule to list entries under a path it should have been denied access to.

Impact Analysis

An attacker with access to a token holding these conflicting rules could potentially enumerate sensitive entry names under restricted paths, leading to unauthorized information disclosure. This could expose internal data or secrets that were meant to be hidden.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected Vault versions may face compliance violations due to potential data exposure.

Mitigation Strategies

Upgrade Vault to the fixed versions: Vault Community Edition 2.0.3 or Vault Enterprise 2.0.3, 1.21.8, 1.20.13, and 1.19.19.

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