Resource exhaustion in Dayuanjiang Next-Ai-Draw-Io
CVE-2026-40608
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.001 (4.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Dayuanjiang Next-Ai-Draw-Io — versions < 0.4.15
- Dayuanjiang Next Ai Draw.io
Weakness classification (CWE)
References
- github.com/DayuanJiang/next-ai-draw-io/security/advisories/GHSA-9q7h-wgfw-p378 (Exploit, Mitigation, Vendor Advisory)
- github.com/DayuanJiang/next-ai-draw-io/commit/31819f413cc4b329a1cb81e5fccd0cd98… (Patch)
Frequently asked questions
- What is CVE-2026-40608?
- CVE-2026-40608 is a medium-severity vulnerability in Dayuanjiang Next-Ai-Draw-Io, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.2/10. Published 2026-04-21.
- How severe is CVE-2026-40608?
- Medium severity. CVSS v3 base score is 6.2 out of 10.