What’s Vulnerable › Vulnerabilities
CVE-2026-19012: Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-07 · updated 2026-08-28
- Weakness: CWE-476
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.
Affected products
- HashiCorp Consul: from 1.18.0 before 2.0.3 — fixed in 2.0.3
- HashiCorp Consul Enterprise: from 1.18.0 before 2.0.3 — fixed in 2.0.3
How to fix
Upgrade to a fixed version: HashiCorp Consul 2.0.3; HashiCorp Consul Enterprise 2.0.3. Check the vendor advisory for mitigations.
References
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