CVE-2026-63131

OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)

Published Sep 23, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao's vault/policy/acl.go could evaluate a broader wildcard ACL grant before more-specific trailing-wildcard ACL paths with capabilities = ["deny"] for a LIST operation. When a parent path permitted LIST and a child path was denied, the trailing-slash lookup could therefore allow listing the denied path. Other operation types are outside the repository advisory's affected scope. This issue is fixed in version 2.6.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-xp3c-3jw3-4vcr OpenBao Skips Stricter Deny Policy for LIST operations
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Openbao
Openbao openbao
Vendors & Products Openbao
Openbao openbao
Type Values Removed Values Added
Description OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao's vault/policy/acl.go could evaluate a broader wildcard ACL grant before more-specific trailing-wildcard ACL paths with capabilities = ["deny"] for a LIST operation. When a parent path permitted LIST and a child path was denied, the trailing-slash lookup could therefore allow listing the denied path. Other operation types are outside the repository advisory's affected scope. This issue is fixed in version 2.6.0.
Title OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)
Weaknesses CWE-863
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 24, 2026, 2:15 PM
Reserved
Jul 15, 2026, 4:54 PM
Status
Deferred
Published
Sep 23, 2026, 7:17 PM
Modified
Sep 29, 2026, 7:06 PM