CVE-2026-31854CWE-78

Cursor Affected by Arbitrary Code Execution via Prompt Injection and Whitelist Bypass

High · published March 11, 2026

CVSS v4.0

8.7

EPSS

Percentile

39.8

In the wild

Unconfirmed

What it is

Cursor is a code editor built for programming with AI. Prior to 2.0 ,if a visited website contains maliciously crafted instructions, the model may attempt to follow them in order to “assist” the user. When combined with a bypass of the command whitelist mechanism, such indirect prompt injections could result in commands being executed automatically, without the user’s explicit intent, thereby posing a significant security risk. This vulnerability is fixed in 2.0.

The record

Technical detail

CVSS v4.0: 8.7 · HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00472 · 39.8th percentile
Weakness: CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published: 2026-03-11T17:11Z

EPSS history

Timeline

11 MAR 17:11Z
Cursor Affected by Arbitrary Code Execution via Prompt Injection and Whitelist Bypass
cvelistv5