---
cve: "CVE-2026-40608"
severity: "MEDIUM"
cvss: 6.2
epss: "0.1%"
vendor: "DayuanJiang"
kev: false
exploited: false
published: "2026-04-21 18:16:52"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T20:02:14+02:00"
---

# CVE-2026-40608

> 6.2 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- d4454beb9ace3ea63139653dc6d2ff2e40d68682 (Commit)
- 31819f413cc4b329a1cb81e5fccd0cd98c1fd665 (Commit)

## Referenzen

- <https://github.com/DayuanJiang/next-ai-draw-io/security/advisories/GHSA-9q7h-wgfw-p378>
- <https://github.com/DayuanJiang/next-ai-draw-io/commit/31819f413cc4b329a1cb81e5fccd0cd98c1fd665>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40608) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_