---
id: "CVE-2026-13303"
kind: "vulnerability"
aliases: ["CVE-2026-13303"]
title: "HashiCorp Boundary: Vault integration lets authenticated users reach internal endpoints"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["boundary", "cloud-metadata", "hashicorp", "infrastructure", "self-hosted", "vault"]
not_affected_if: ["managed-hosting", "no-credential-manage-role", "no-vault-credential-store"]
published_at: "2026-10-29T21:17:22+00:00"
first_seen_at: "2026-10-29T21:26:52+00:00"
updated_at: "2026-10-29T21:28:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13303", "first_seen_at": "2026-10-29T21:26:52+00:00"}]
---

# HashiCorp Boundary: Vault integration lets authenticated users reach internal endpoints

Boundary's Vault credential store integration can be made to send outbound requests to a destination chosen by the requester and return the response. An attacker with credential-management rights can use the controller to read services reachable only from the controller's host, such as a cloud metadata service.

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

## How to check

- Check the Boundary version with `boundary version`
- Check whether Vault credential stores or credential libraries are in use in your Boundary projects

## Fix

- Boundary Enterprise: `1.0.2` and `0.21.6`
- Open-source Boundary: unknown

## Timeline

- 2026-10-29T21:26:52+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-13303

## From the sources

HashiCorp Boundary and Boundary Enterprise are vulnerable to a server-side request forgery in the Vault credential store integration that may allow an authenticated user with permission to manage credential stores and credential libraries within a project to cause the Boundary controller to issue outbound requests to a network destination of the requester's choosing and to receive the response. This may expose endpoints reachable only from the controller's host, such as a cloud instance metadata service. This vulnerability, CVE-2026-13303, is fixed in Boundary Enterprise 1.0.2 and 0.21.6.

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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_