Cursor — Sandbox Escape (CVE-2026-48124)
Date: 2026-06
Attack vector: sandbox-escape
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-48124
CWE: CWE-829
CWE-94

Cursor is a code editor built for programming with AI. In versions prior to 3.0.0, the Cursor Desktop could execute workspace-defined Claude hook commands from .claude/settings.local.json without dedicated user approval. A malicious workspace or agent-created file could configure hooks that run local commands in the user's context when an agent turn ends. This could allow sandbox escape, persistence across turns, local data access, or follow-on compromise. This issue has been fixed in version 3.0.0.


Mitigations:

Architectural layers (MAESTRO):