CVE-2026-73217: Cursor: Sandbox escape via tampered Python virtual environments

Severity: high (CVSS 7.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-09-09
Weakness: CWE-693

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.

Affected products

cursor: before 3.1.2

References

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

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