Cursor vulnerabilities

Cursor IDE for macOS before version 3.0.0 allows an agent running in Auto-Run Sandbox mode, when Docker Desktop and Dev Containers CLI are installed, to launch a privileged container and mount Docker's virtiofs0, granting read/write access to the user's home directory and enabling host command execution with the user's privileges without an additional permission prompt.

Cursor IDE for macOS before version 3.1.2 allows an agent running in Auto-Run Sandbox mode to replace a virtual environment's Python executable with a malicious wrapper that the Microsoft Python extension invokes outside the sandbox, allowing arbitrary host commands with the user's privileges, including modifying files outside the workspace and launching applications.

A binary planting vulnerability in Cursor for Windows version 3.2.16 allows remote attackers to achieve arbitrary code execution by placing a malicious git.exe in the repository root. When a developer clones and opens a crafted repository, Cursor automatically executes the malicious binary without user interaction.

A vulnerability in Cursor editor before 03/31/2026 allowed attacker-controlled web content to connect to an unauthenticated local agent endpoint, enabling code execution in the cloud agent sandbox and access to files, repositories, environment variables, credentials, and GitHub App tokens. The issue was fixed on 03/31/2026 by requiring authentication for the relevant endpoint.