---
id: CVE-2026-87090
title: Consul vulnerable to an authorization bypass in the catalog node-write path
summary: >-
  Consul and Consul Enterprise are vulnerable to an authorization bypass in the
  catalog node-write path that may allow an authenticated attacker to delete
  another node's catalog registration and take over its node identity. An
  attacker wit…
severity: high
cvss: 8.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-863
vendor: HashiCorp
product: Consul
affected:
  - Consul >= 0.1.0 < 2.0.4
  - consul_enterprise >= 0.1.0 < 2.0.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T19:02:38.060194Z'
published: '2026-09-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T19:02:58.403Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87090'
references:
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736
tags:
  - cve.org
epss: 0.00372
epssPercentile: 0.28412
ingestedAt: '2026-09-11T16:45:48.026Z'
---

## Overview

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node's catalog registration and take over its node identity. An attacker with a token granting node-write permission on any single node name may exploit this issue if they can obtain the node ID of a node they do not control. This vulnerability (CVE-2026-87090) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

## Affected

- `Consul >= 0.1.0 < 2.0.4`
- `consul_enterprise >= 0.1.0 < 2.0.4`

## Remediation

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