Security Bulletin: Authorization bypass for session deletion in the transaction API

Summary Consul Community Edition and Consul Enterprise 1.19.1 through 2.0.2 did not enforce the session:write ACL permission for session deletion operations submitted through the transaction API. An authenticated caller with network access to the Consul server RPC port could delete arbitrary...

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

Summary 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...

DEBIAN-CVE-2026-19014

Consul Community Edition and Consul Enterprise 1.17.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect authorization endpoint that may allow a caller to grow the agent's intention-match cache without bound, defeating the operator's cache-disable...

DEBIAN-CVE-2026-19015

Consul Community Edition and Consul Enterprise 1.2.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect CA roots endpoint that may allow a remote caller to grow the agent's Connect CA roots cache without bound, defeating the operator's cache-disable...

CVE-2026-19014

Consul Community Edition and Consul Enterprise 1.17.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect authorization endpoint that may allow a caller to grow the agent's intention-match cache without bound, defeating the operator's cache-disable...

EUVD-2026-54612

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 incomplet...

CVE-2026-19015 Uncontrolled resource consumption in the Consul Connect CA roots endpoint

Consul Community Edition and Consul Enterprise 1.2.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect CA roots endpoint that may allow a remote caller to grow the agent's Connect CA roots cache without bound, defeating the operator's cache-disable...

EUVD-2026-54608

Consul Community Edition and Consul Enterprise 1.2.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect CA roots endpoint that may allow a remote caller to grow the agent's Connect CA roots cache without bound, defeating the operator's cache-disable...

CVE-2026-19014 Uncontrolled resource consumption in the Consul Connect authorization endpoint

Consul Community Edition and Consul Enterprise 1.17.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect authorization endpoint that may allow a caller to grow the agent's intention-match cache without bound, defeating the operator's cache-disable...

EUVD-2026-54605

Consul Community Edition and Consul Enterprise 1.19.1 through 2.0.2 did not enforce the session:write ACL permission for session deletion operations submitted through the transaction API. An authenticated caller with network access to the Consul server RPC port could delete arbitrary sessions...

Security Bulletin:Consul’s event endpoint is vulnerable to denial of service

Summary Consul and Consul Enterprise’s “Consul” event endpoint is vulnerable to denial of service DoS due to lack of maximum value on the Content Length header. Vulnerability Details CVEID: CVE-2025-11375 DESCRIPTION: Consul and Consul Enterprise’s “Consul” event endpoint is vulnerable to denial ...

CVE-2025-11375 Consul's event endpoint is vulnerable to denial of service

Consul and Consul Enterprise’s “Consul” event endpoint is vulnerable to denial of service DoS due to lack of maximum value on the Content Length header. This vulnerability, CVE-2025-11375, is fixed in Consul Community Edition 1.22.0 and Consul Enterprise 1.22.0, 1.21.6, 1.20.8 and 1.18.12...

The vulnerability of the Consul Community Edition and Consul Enterprise configuration tools lies in their failure to remove HTTP headers from script syntax, allowing attackers to gain access to confidential information.

The vulnerability of the Consul service configuration tool lies in the lack of measures taken to neutralize HTTP headers in script syntax. Exploiting this vulnerability allows a malicious actor, operating remotely, to gain access to confidential information through a specially crafted HTTP reques...