CVE-2026-15972: Hashicorp Consul

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Consul Community Edition and Consul Enterprise 1.13.0 through 2.0.2 are vulnerable to an unauthenticated denial of service through unbounded connection acceptance on the external gRPC listeners. A remote attacker may exhaust agent file descriptors, goroutines, and memory by opening many incomplete connections, potentially preventing legitimate clients from connecting. This vulnerability, CVE-2026-15972, 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 1.13.0, before 2.0.3 (fixed in 2.0.3)
• Hashicorp Consul Enterprise: from 1.13.0, before 2.0.3 (fixed in 2.0.3)

Published 2026-08-07. Last modified 2026-08-28.