CVE-2026-50548: Anysphere Cursor

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

Cursor is a code editor built for programming with AI. Prior to 3.0, Cursor runs agent terminal commands in a sandbox by default, and the sandbox grants write access to the command's working directory. A flaw was identified in how the agent could modify the working_directory parameter, which could cause the sandbox to include writable paths outside the intended workspace. A malicious agent could set working_directory to a sensitive location and write arbitrary files outside the workspace under the user's privileges. This enables non-sandboxed Remote Code Execution — for example by overwriting the cursorsandbox helper so later commands run unsandboxed — with no user interaction beyond a benign prompt. This vulnerability is fixed in 3.0.

Affected products

• Anysphere Cursor: before 3.0 (fixed in 3.0)

Published 2026-06-25. Last modified 2026-06-26.