---
id: "CVE-2026-115366"
kind: "vulnerability"
aliases: ["CVE-2026-115366"]
title: "OpenBao: child-namespace tokens can modify plugin registrations, causing denial of service"
severity: "low"
cvss: 2.6
epss: 0.00179
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "openbao", "secrets-management", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2026-10-22T19:17:43+00:00"
first_seen_at: "2026-10-23T21:57:31+00:00"
updated_at: "2026-10-25T04:49:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115366", "first_seen_at": "2026-10-23T21:57:31+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-115366", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# OpenBao: child-namespace tokens can modify plugin registrations, causing denial of service

OpenBao from 2.3.0 before 2.6.3 lets a privileged token in a child namespace change plugin catalog registrations, because the /v1/sys/plugins/catalog/ endpoints are not limited to the root namespace. An attacker can delete registrations, create invalid ones, or register installed plugins, which can cause denial of service.

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

## How to check

- Check the OpenBao version with `bao version`; versions from 2.3.0 up to but not including 2.6.3 are affected.
- Check whether namespaces are in use with `bao namespace list`; the issue needs a child namespace with a privileged token.

## Fix

- Upgrade OpenBao to `2.6.3` or later.

## Timeline

- 2026-10-23T21:57:31+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115366
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-115366

## From the sources

OpenBao from 2.3.0 before 2.6.3 contains an improper authorization vulnerability that allows privileged child-namespace tokens to modify plugin registrations because /v1/sys/plugins/catalog/* is not restricted to the root namespace. Attackers can remove existing registrations, create invalid ones, or register installed plugins through a child namespace's sys/ mount, causing denial of service.

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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_