Consul vulnerable to an authorization bypass in the catalog node-write path

Summary Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node’s catalog registration and take over its node identity. An attacker with a token granting node-write permission on any sing...

CVE-2026-87993: Insertion of Sensitive Information into Log File

The consul-template library is vulnerable to an information disclosure issue in its error handling path that may allow Vault secret values to appear in template error messages, log output, and downstream surfaces such as Nomad task events. This vulnerability CVE-2026-87993 is fixed in...

CVE-2026-87090: Incorrect Authorization

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node's catalog registration and take over its node identity. An attacker with a token granting node-write permission on any single node...

PT-2026-89569

Name of the Vulnerable Software and Affected Versions consul-template versions prior to 0.43.0 Description An information disclosure issue exists in the error handling path of the library. This flaw may allow Vault secret values to be exposed within template error messages, log output, and...

PT-2026-89567

Name of the Vulnerable Software and Affected Versions Consul versions prior to 2.0.4 Consul Enterprise versions prior to 1.21.18 Consul Enterprise versions prior to 1.22.12 Consul Enterprise versions prior to 2.0.4 Description A denial of service exists in the native RPC listener. An authenticate...

CVE-2026-87106: Uncontrolled Resource Consumption

Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a...

PT-2026-89568

Name of the Vulnerable Software and Affected Versions Consul versions prior to 2.0.4 Consul Enterprise versions prior to 1.21.18 Consul Enterprise versions prior to 1.22.12 Consul Enterprise versions prior to 2.0.4 Description An authorization bypass exists in the catalog deregistration path. A...

CVE-2026-87107: Incorrect Authorization

Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with service:write or node:write permission may exploit this issue to remove services, checks, or nodes...

CVE-2026-88021: Incorrect Regular Expression

Consul and Consul Enterprise are vulnerable to an authorization bypass in the Connect service mesh that may allow a service to reach a destination it is not authorized to access. When building Envoy RBAC rules to enforce Connect intentions, Consul did not correctly escape certain characters in...

PT-2026-89566

Name of the Vulnerable Software and Affected Versions Consul versions prior to 2.0.4 Consul Enterprise versions prior to 1.21.18 Consul Enterprise versions prior to 1.22.12 Consul Enterprise versions prior to 2.0.4 Description An authorization bypass exists in the catalog node-write path. An...

PT-2026-89570

Name of the Vulnerable Software and Affected Versions Consul versions prior to 2.0.4 Consul Enterprise versions prior to 1.21.18 Consul Enterprise versions prior to 1.22.12 Consul Enterprise versions prior to 2.0.4 Description An authorization bypass exists in the Connect service mesh. This occur...

BIT-CONSUL-2026-19113 Unauthenticated denial of service via unbounded request body processing

Consul Community Edition and Consul Enterprise 1.3.0 through 2.0.2 are vulnerable to an unauthenticated denial of service in several agent HTTP API endpoints. A remote caller could cause the agent to consume substantial memory before the request was rejected. This vulnerability, CVE-2026-19113, i...

BIT-CONSUL-2026-19017 Consul vulnerable to partial arbitrary file read via Vault Connect CA provider

Consul Community Edition and Consul Enterprise 1.18.21 through 2.0.2 are vulnerable to a partial arbitrary file read when configured to use the Vault Connect CA provider with JWT or AppRole authentication. A privileged attacker with operator:write permission may direct Consul to read and forward...

BIT-CONSUL-2026-19016 Authorization bypass for session deletion in the transaction API

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...

BIT-CONSUL-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...

BIT-CONSUL-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...

BIT-CONSUL-2026-19012 Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path

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...

BIT-CONSUL-2026-16328 consul-mcp-server vulnerable to server side request forgery leading to token exposure

In consul-mcp-server, versions 0.1.0 up to 0.1.3 did not restrict how the Consul backend address was supplied, allowing a connected client to override the server's configured Consul address via a request header. This may allow a malicious client to redirect the server's Consul API traffic to an...

BIT-CONSUL-2026-16326 consul-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode

In consul-mcp-server, versions 0.1.0 up to 0.1.3 did not properly isolate session state in stateless mode, which may allow one client's Consul authentication token to be used for subsequent requests from other clients. This vulnerability CVE-2026-16326 is fixed in consul-mcp-server 0.1.4...

BIT-CONSUL-2026-15972 Unauthenticated denial of service via unbounded external gRPC connection acceptance

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...