Cursor — Prompt Injection (CVE-2026-26268)
Date: 2026-02
Affected: anysphere/cursor
Attack vector: prompt-injection
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2026-26268
CWE: CWE-862
CVSS: 8 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)

Cursor is a code editor built for programming with AI. Sandbox escape via writing .git configuration was possible in versions prior to 2.5. A malicious agent (ie prompt injection) could write to improperly protected .git settings, including git hooks, which may cause out-of-sandbox RCE next time they are triggered. No user interaction was required as Git executes these commands automatically. Fixed in version 2.5.


Mitigations:

Architectural layers (MAESTRO):