CVE-2026-40608— Next AI Draw.io: Unbounded HTTP Body — Denial of Service
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I. Basic Information for CVE-2026-40608
Vulnerability Information
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Vulnerability Title
Next AI Draw.io: Unbounded HTTP Body — Denial of Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
Next AI Draw.io is a next.js web application that integrates AI capabilities with draw.io diagrams. Prior to 0.4.15, the embedded HTTP sidecar contains three POST handlers (/api/state, /api/restore, and /api/history-svg) that process incoming requests by accumulating the entire request body into a JavaScript string without any size limitations. Node.js buffers the entire payload in the V8 heap. Sending a sufficiently large body (e.g., 500 MiB or more) will exhaust the process heap memory, leading to an Out-of-Memory (OOM) error that crashes the MCP server. This vulnerability is fixed in 0.4.15.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Next AI Draw.io 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Next AI Draw.io是Dayuan Jiang个人开发者的一个AI驱动的在线图表绘制工具。 Next AI Draw.io 0.4.15之前版本存在安全漏洞，该漏洞源于处理请求时无大小限制，可能导致耗尽堆内存并造成内存不足错误，使MCP服务器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| DayuanJiang | next-ai-draw-io | < 0.4.15 | - |
II. Public POCs for CVE-2026-40608
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-770
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