CVEs / CVE-2025-54135
CVE-2025-54135
Cursor is a code editor built for programming with AI. Cursor allows writing in-workspace files with no user approval in versions below 1.3.9, If the file is a dotfile, editing it requires approval but creating a new one doesn't. Hence, if sensitive MCP files, such as the .cursor/mcp.json file don't already exist in the workspace, an attacker can chain a indirect prompt injection vulnerability to hijack the context to write to the settings file and trigger RCE on the victim without user approval. This is fixed in version 1.3.9.
Affected products · 1
| Product | Versions affected | Fixed in |
|---|---|---|
| Cursor | < 1.3.9 | 1.3.9 |
Versions as NVD's CPE configuration states them; "—" means the record gives no fixed version, not that none exists. Check the vendor's advisory in the references.
In this registry
- TR-2026-011 CurXecute and MCPoison: prompt injection and config swaps turn Cursor's MCP support into code execution — a public trace that names this CVE
References · 1
- github.com/cursor/cursor/security/advisories/GHSA-4cxx-hrm3-49rm — Mitigation, Vendor Advisory
The official record's references, as NVD lists them, minus any tagged Exploit. Nothing here is an exploit or a proof of concept.
Description, scores, versions and references are the official CVE record's own, retrieved 2026-10-25 from NVD. Category, attack surface and cross-links are this registry's classification and can be wrong — use the button above. Not a severity assessment for your deployment.