---
id: CVE-2026-105608
title: Consul vulnerable to an authorization bypass in service mesh registration
summary: >-
  HashiCorp Consul and Consul Enterprise are vulnerable to an authorization
  bypass in service mesh proxy registration. This may allow a user with service
  write permission to apply Envoy escape-hatch configuration without the
  required mesh …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-178
vendor: HashiCorp
product: Consul
affected:
  - Consul >= 2.0.4 < 2.1.0
  - consul_enterprise >= 2.0.4 < 2.1.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-26T19:05:41.796579Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T19:38:29.607Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105608'
references:
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2026-47-consul-vulnerable-to-an-authorization-bypass-in-service-mesh-registration/77912
tags:
  - cve.org
ingestedAt: '2026-10-26T18:35:51.650Z'
epss: 0.00452
epssPercentile: 0.39059
---

## Overview

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh proxy registration. This may allow a user with service write permission to apply Envoy escape-hatch configuration without the required mesh write permission. This vulnerability (CVE-2026-105608) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

## Affected

- `Consul >= 2.0.4 < 2.1.0`
- `consul_enterprise >= 2.0.4 < 2.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.