---
title: "CVE-2026-105608: HashiCorp Consul - Authorization Bypass"
description: "HashiCorp Consul and Consul Enterprise < 2.1.0 contain an authorization bypass caused by improper permission checks in service mesh proxy registration, letting users with service write permission apply Envoy escape-hatch configuration without mesh write permission, exploit requires service write permission."
url: https://panop.io/threat-heartbeat/CVE-2026-105608/
---

# CVE-2026-105608 HashiCorp Consul - Authorization Bypass

HashiCorp Consul and Consul Enterprise < 2.1.0 contain an authorization bypass caused by improper permission checks in service mesh proxy registration, letting users with service write permission apply Envoy escape-hatch configuration without mesh write permission, exploit requires service write permission.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-105608)

## Details

Type

Authorization Bypass

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-178](https://cwe.mitre.org/data/definitions/178.html)

## Vendor fix

Update to Consul Community Edition 2.1.0, Consul Enterprise 2.1.0 or 1.21.19.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-105608](https://nvd.nist.gov/vuln/detail/CVE-2026-105608)
- [https://discuss.hashicorp.com/t/hcsec-2026-47-consul-vulnerable-to-an-authorization-bypass-in-service-mesh-registration/77912](https://discuss.hashicorp.com/t/hcsec-2026-47-consul-vulnerable-to-an-authorization-bypass-in-service-mesh-registration/77912)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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