Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path (CVE-2026-19012) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-19012

Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path

Answer in brief

CVE-2026-19012 records a Medium severity (CVSS 5.3) vulnerability in Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path. The current sources do not mark it as known exploited. The current feed maps HashiCorp/Consul (generic), HashiCorp/Consul Enterprise (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 7, 2026Updated Aug 28, 2026Source checked Sep 22, 2026First seen by HOL Aug 7, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps HashiCorp/Consul (generic), HashiCorp/Consul Enterprise (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
HashiCorp/Consulgeneric	>=1.18.0 <2.0.3	2.0.3
HashiCorp/Consul Enterprisegeneric	>=1.18.0 <2.0.3	2.0.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for HashiCorp/Consul, HashiCorp/Consul Enterprise.
Review the reported fix. Update HashiCorp/Consul to 2.0.3; HashiCorp/Consul Enterprise to 2.0.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 7, 2026

Sources and claim methodology

Source referencediscuss.hashicorp.com

Upstream source description

Consul Community Edition and Consul Enterprise 1.18.0 through 2.0.2 are vulnerable to an authenticated denial of service in the Enterprise-to-Community Edition downgrade path that may allow an authorized caller to crash the Consul server. A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. This vulnerability, CVE-2026-19012, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.

Quoted source text, attributed separately from HOL analysis.