Consul Server Panic when Ingress and API Gateways Configured with Peering Connections

Medium6.5CVE-2023-0845 · Published Mar 9, 2023 · updated Aug 7, 2026

A vulnerability was identified in Consul and Consul Enterprise (“Consul”) an authenticated user with service:write permissions could trigger a workflow that causes Consul server and client agents to crash under certain circumstances. To exploit this vulnerability, an attacker requires access to an ACL token with service:write permissions, and there needs to be at least one running ingress or API gateway that is configured to route traffic to an upstream service.