---
id: CVE-2026-105626
title: Consul vulnerable to a denial of service in HTTP APIs
summary: >-
  HashiCorp Consul and Consul Enterprise are vulnerable to a denial of service
  in the HTTP API that may allow an unauthenticated attacker to exhaust memory
  on a Consul agent. This vulnerability (CVE-2026-105626) is fixed in Consul
  Communit…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-770
vendor: HashiCorp
product: Consul
affected:
  - Consul >= 0.6.0 < 2.1.0
  - consul_enterprise >= 0.6.0 < 2.1.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-26T18:59:37.651193Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T19:38:29.471Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105626'
references:
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2026-48-consul-vulnerable-to-a-denial-of-service-in-http-apis/77913
tags:
  - cve.org
ingestedAt: '2026-10-26T18:35:51.508Z'
epss: 0.0043
epssPercentile: 0.37016
---

## Overview

HashiCorp Consul and Consul Enterprise are vulnerable to a denial of service in the HTTP API that may allow an unauthenticated attacker to exhaust memory on a Consul agent. This vulnerability (CVE-2026-105626) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

## Affected

- `Consul >= 0.6.0 < 2.1.0`
- `consul_enterprise >= 0.6.0 < 2.1.0`

## Remediation

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