CVE-2026-40608

Summary

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.

Affected Software

Weaknesses

• CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/DayuanJiang/next-ai-draw-io/security/advisories/GHSA-9q7h-wgfw-p378

References

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

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