CVE-2026-31854 HIGH

CVE-2026-31854: Cursor Affected by Arbitrary Code Execution via Prompt Injection and Whitelist Bypass

Vendor Cursor
Product cursor
Weakness CWE-78
Published March 11, 2026
Last update March 11, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 11, 2026 CVE published
March 11, 2026 Record updated