Cognition before 0.13.0 contains an unauthenticated remote code execution vulnerability due to defaulting its agent sandbox backend to local execution and shipping no authentication on its REST/SSE API. Attackers can create a session via POST /sessions and post a message via POST /sessions/{id}/messages without credentials, causing the Deep Agents ReAct loop to run attacker-directed shell commands through the local shell backend, resulting in remote code execution as the server process.

Cognition Devin before 2024-12-12 provides write access to code by an attacker who discovers the https://vscode-randomlygeneratedstring.devinapps.com URL (aka the VSCode live share URL) for a specific "Use Devin's Machine" session. For example, this URL may be discovered if a customer posts a screenshot of a Devin session to social media, or publicly streams their Devin session.