What is CVE-2025-64109?

CVE-2025-64109 is a high-severity vulnerability in Cursor, classified under OS Command Injection. CVSS score: 8.8/10. Published 2025-11-05.

How severe is CVE-2025-64109?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Cursor

CVE-2025-64109

Cursor is a code editor built for programming with AI. In versions and below, a vulnerability in the Cursor CLI Beta allowed an attacker to achieve remote code execution through the MCP (Model Context Protocol) server mechanism by uploading a malicious MCP configuration in .cursor/mcp.json file in a GitHub repository. Once a victim clones the project and opens it using Cursor CLI, the command to run the malicious MCP server is immediately executed without any warning, leading to potential code execution as soon as the command runs. This issue is fixed in version 2025.09.17-25b418f.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.005 (38.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Cursor — versions < 2025.09.17-25b418f

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2025-64109?: CVE-2025-64109 is a high-severity vulnerability in Cursor, classified under OS Command Injection. CVSS score: 8.8/10. Published 2025-11-05.
How severe is CVE-2025-64109?: High severity. CVSS v3 base score is 8.8 out of 10.