---
title: "CVE-2026-110720: Consul-k8s - Broken Access Control"
description: "Consul-k8s >= 0.42.0 contains a broken access control caused by cross-namespace authorization bypass in ACL binding rules, letting attackers obtain elevated Consul privileges, exploit requires access to the cluster."
url: https://panop.io/threat-heartbeat/CVE-2026-110720/
---

# CVE-2026-110720 Consul-k8s - Broken Access Control

Consul-k8s >= 0.42.0 contains a broken access control caused by cross-namespace authorization bypass in ACL binding rules, letting attackers obtain elevated Consul privileges, exploit requires access to the cluster.

CVSS base score 9.9 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-110720)

## Details

Type

Broken Access Control

Impact

Privilege Escalation

CVSS vector

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

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to versions 2.1.0 or 1.8.18 or later.

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-2026-110720](https://nvd.nist.gov/vuln/detail/CVE-2026-110720)
- [https://discuss.hashicorp.com/t/hcsec-2026-50-consul-k8s-vulnerable-to-a-cross-namespace-authorization-bypass-in-component-acl-binding-rules/77915](https://discuss.hashicorp.com/t/hcsec-2026-50-consul-k8s-vulnerable-to-a-cross-namespace-authorization-bypass-in-component-acl-binding-rules/77915)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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