Arbitrary file write via unchecked export path
Published Jul 21, 2026 · Updated Jul 21, 2026
Path traversal in DayuanJiang next-ai-draw-io 0.4.13 allows context-dependent attackers to write arbitrary local files. The MCP server's export_diagram tool resolves an unrestricted path parameter and passes the result to fs.writeFile without checking that it remains under an allowed directory. Exploitation requires a running local MCP session and an attacker-influenced tool call; writes are limited to the user's permissions, and code execution requires targeting an interpreted startup or configuration file.
Summary
What happened
Path traversal in DayuanJiang next-ai-draw-io 0.4.13 allows context-dependent attackers to write arbitrary local files. The MCP server's export_diagram tool resolves an unrestricted path parameter and passes the result to fs.writeFile without checking that it remains under an allowed directory. Exploitation requires a running local MCP session and an attacker-influenced tool call; writes are limited to the user's permissions, and code execution requires targeting an interpreted startup or configuration file.
The record
- CVE
- CVE-2026-50757
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-22, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Attacks
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Technologies
Your stack
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