---
id: CVE-2026-40264
aliases:
  - GHSA-p49j-v9wc-wg57
  - BIT-openbao-2026-40264
  - GO-2026-5526
title: 'OpenBao''s Token Store Allows Cross-Namespace Renewal, Revocation'
summary: 'OpenBao''s Token Store Allows Cross-Namespace Renewal, Revocation'
severity: low
vendor: openbao
product: github.com/openbao/openbao
ecosystem: go
affected:
  - github.com/openbao/openbao < 0.0.0-20260420162526-f58111d2ca54
patched:
  - github.com/openbao/openbao 0.0.0-20260420162526-f58111d2ca54
published: '2026-04-21'
updated: '2026-07-27'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-p49j-v9wc-wg57'
references:
  - url: 'https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40264'
  - url: 'https://github.com/openbao/openbao/pull/2934'
  - url: >-
      https://github.com/openbao/openbao/commit/059cc5950303688335d5c8ab9af8e453795d693a
  - url: 'https://github.com/openbao/openbao'
  - url: 'https://github.com/openbao/openbao/releases/tag/v2.5.3'
tags:
  - osv
  - go
epss: 0.00301
epssPercentile: 0.2302
ingestedAt: '2026-07-27T19:08:54.961Z'
---

## Overview

### Impact

OpenBao's namespaces provide multi-tenant separation. A tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant.

### Patches

This was addressed in v2.5.3.

## Affected packages

- `github.com/openbao/openbao < 0.0.0-20260420162526-f58111d2ca54`

## Remediation

Upgrade to a patched release:

- `github.com/openbao/openbao 0.0.0-20260420162526-f58111d2ca54`