---
id: "CVE-2026-63131"
kind: "vulnerability"
aliases: ["CVE-2026-63131", "GHSA-xp3c-3jw3-4vcr", "GO-2026-6579"]
title: "OpenBao Skips Stricter Deny Policy for LIST operations in github.com/openbao/openbao"
severity: "medium"
cvss: 6.0
epss: 0.00354
exploited: false
status: "open"
category: "package"
products: [{"name": "github.com/openbao/openbao", "fixed": ["0.0.0-20260713133043-f58d848c139e"], "affected": ">= 0.1.0, < 0.0.0-20260713133043-f58d848c139e", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["go", "openbao", "package", "secrets-management", "self-hosted"]
not_affected_if: ["no-deny-policies", "version-2.6.0-or-later"]
published_at: "2026-09-23T19:17:34+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T21:48:47+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6579", "first_seen_at": "2026-10-23T19:13:08+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-63131", "first_seen_at": "2026-10-23T19:13:43+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63131", "first_seen_at": "2026-10-23T19:35:23+00:00"}]
---

# OpenBao Skips Stricter Deny Policy for LIST operations in github.com/openbao/openbao

OpenBao's ACL evaluation can apply a broader wildcard allow before a more specific deny on a child path when a LIST request is made. An authenticated user can therefore list secret paths that policy explicitly denies.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:github.com/openbao/openbao affected >= 0.1.0, < 0.0.0-20260713133043-f58d848c139e fixed 0.0.0-20260713133043-f58d848c139e

## Fix

Upgrade github.com/openbao/openbao to 0.0.0-20260713133043-f58d848c139e or later (OpenBao 2.6.0).

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6579
- 2026-10-23T19:13:43+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-63131
- 2026-10-23T19:35:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-63131

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_