CVE-2026-73217

Cursor: Sandbox escape via tampered Python virtual environments

State: Published
Severity: 7.7 High
Published: Aug 11, 2026
Updated: Aug 11, 2026
Reserved: Aug 11, 2026

Description

Cursor is a code editor built for programming with AI. Prior to 3.1.2, Cursor IDE for macOS 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. This issue is fixed in version 3.1.2.

Scores

CVSS	Score	Vector	Source
4.0	7.7 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
cursorcursor	< 3.1.2Affected

References

https://github.com/cursor/cursor/security/advisories/GHSA-p9g2-cr55-cw9c

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