EUVD-2026-84951

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...

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...