Cursor IDE: Sensitive File Overwrite Bypass is Possible
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Cursor is a code editor built for programming with AI. Versions 1.6.23 and below contain case-sensitive checks in the way Cursor IDE protects its sensitive files (e.g., */.cursor/mcp.json), which allows attackers to modify the content of these files through prompt injection and achieve remote code execution. A prompt injection can lead to full RCE through modifying sensitive files on case-insensitive fileystems. This issue is fixed in version 1.7.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA cursor (cursor) Fixed in 1.7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59944
References
More Cursor vulnerabilities
- TI-2026-45043 Cursor for Windows 3.2.16 RCE via Malicious git.exe in Workspace CVSS 4.0HIGH 8.7
- TI-2025-33979 Cursor's Modification of MCP Server Definitions Bypasses Manual Re-approvals CVSS 3.1HIGH 8.8
- TI-2026-37271 Cursor Desktop sandbox escape via symlink and failed path canonicalization CVSS 4.0CRITICAL 9.3
- TI-2026-37270 Cursor Desktop sandbox escape via agent-controlled working directory CVSS 4.0CRITICAL 9.3
- TI-2025-38037 Cursor CLI's Cursor Agent MCP OAuth2 Communication is Vulnerable to Remote Code Execution CVSS 3.1HIGH 8.8
- TI-2025-33978 Cursor Agent is vulnerable to prompt injection via MCP Special Files CVSS 3.1CRITICAL 9.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences