CVE-2026-19012
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
A vulnerability in Consul Community Edition and Consul Enterprise versions 1.18.0 through 2.0.2 allows an authenticated attacker to crash the Consul server during the Enterprise-to-Community downgrade path. A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. The issue is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Risk Assessment
The risk is that an authenticated user can crash the Consul server, leading to service unavailability and disruption of configuration management.
Recommendation
Upgrade Consul to version 2.0.3 or later (for Enterprise to the specified versions) and restrict write permissions for configuration entries.
Original NVD description (English source)
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.