CVE-2026-50548 – Cursor Desktop sandbox escape via agent-controlled working directory

CVE ID :CVE-2026-50548

Published : June 25, 2026, 6:47 p.m. | 57 minutes ago

Description :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.

Severity: 0.0 | NA

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