CVE-2026-19202

The mcp-toolbox-sdk-python SDK contains a caching flaw within its toolbox-core package. The module-level token cache fails to uniquely key Google ID tokens by the requested audience. If an application authenticates to multiple audiences (e.g., Service A and Service B) within the same process, a v...

CVE-2026-19202 Token Cache Reuse in mcp-toolbox-sdk-python

A caching flaw in the toolbox-core package of the mcp-toolbox-sdk-python SDK causes the same Google ID token to be cached and reused across different audiences. If an application uses the SDK to authenticate to two or more different audiences within the same process, the module-level token cache...

PT-2026-97091

Name of the Vulnerable Software and Affected Versions mcp-toolbox-sdk-python affected versions not specified Description A caching flaw in the toolbox-core package allows a Google ID token to be cached and reused across different audiences within the same process. The module-level token cache fai...

CVE-2021-41130

Extensible Service Proxy, a.k.a. ESP is a proxy which enables API management capabilities for JSON/REST or gRPC API services. ESPv1 can be configured to authenticate a JWT token. Its verified JWT claim is passed to the application by HTTP header "X-Endpoint-API-UserInfo", the application can use ...

Authorization

Extensible Service Proxy, a.k.a. ESP is a proxy which enables API management capabilities for JSON/REST or gRPC API services. ESPv1 can be configured to authenticate a JWT token. Its verified JWT claim is passed to the application by HTTP header "X-Endpoint-API-UserInfo", the application can use ...

CVE-2021-41130 X-Endpoint-API-UserInfo can be spoofed in cloudendpoints Extensible Service Proxy

Extensible Service Proxy, a.k.a. ESP is a proxy which enables API management capabilities for JSON/REST or gRPC API services. ESPv1 can be configured to authenticate a JWT token. Its verified JWT claim is passed to the application by HTTP header "X-Endpoint-API-UserInfo", the application can use ...

CVE-2021-41130

CVE-2021-41130 affects Extensible Service Proxy (ESP), specifically ESPv1, where the verified JWT claim is exposed to the application via the HTTP header X-Endpoint-API-UserInfo. If a client sends two such headers, ESPv1 only replaces the first, allowing the second header to reach the application...