---
id: CVE-2026-110720
title: >-
  Consul-k8s vulnerable to a cross-namespace authorization bypass in component
  ACL binding rules
summary: >-
  Consul-k8s versions 0.42.0 and later are vulnerable to a cross-namespace
  authorization bypass in component ACL binding rules that may allow an attacker
  to obtain elevated Consul privileges. This vulnerability (CVE-2026-110720) is
  fixed i…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-863
vendor: HashiCorp
product: Tooling
affected:
  - Tooling >= 0.42.0 < 2.0.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-26T19:06:05.963836Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T19:38:28.240Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-110720'
references:
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2026-50-consul-k8s-vulnerable-to-a-cross-namespace-authorization-bypass-in-component-acl-binding-rules/77915
tags:
  - cve.org
ingestedAt: '2026-10-26T19:38:01.340Z'
epss: 0.00365
epssPercentile: 0.30124
---

## Overview

Consul-k8s versions 0.42.0 and later are vulnerable to a cross-namespace authorization bypass in component ACL binding rules that may allow an attacker to obtain elevated Consul privileges. This vulnerability (CVE-2026-110720) is fixed in consul-k8s 2.1.0 and 1.8.18.

## Affected

- `Tooling >= 0.42.0 < 2.0.4`

## Remediation

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