The FileSessionManager defaults to storing session data in /tmp/strands/sessions/ (a world-writable directory) using predictable file paths and a write pattern (open(path + ".tmp", "w") → os.replace()) that follows symbolic links. A local attacker can exploit this to overwrite arbitrary files or inject malicious session data for persistent prompt injection.
There is a local confidentiality issue in the default FileSessionManager storage behavior. By default it writes session data under /tmp/strands/sessions and relies on the process umask for directory and file permissions. On systems using the common umask 022, the session directories are 0755 and JSON files are 0644, so other local users can read persisted agent session data. This matters on shared developer machines, CI hosts, notebooks, jump boxes, and …
Summary Strands Agents SDK is an open-source SDK, available for Python (strands-agents) and TypeScript (@strands-agents/sdk), for building and running AI agents. An issue exists where, under certain circumstances, the Agent2Agent (A2A) server shares conversation history across callers with different context_id values, allowing one caller to read and influence another caller's session. Impact The A2A server did not properly isolate conversation state between callers. In multi-tenant deployments, an authenticated remote user …