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Wednesday, 28 October 2026
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Incident database

CVE-2026-40608: Unbounded request body crashes Next AI Draw.io MCP sidecar

Next AI Draw.io versions prior to 0.4.15 accumulated entire HTTP request bodies into memory in three POST handlers (/api/state, /api/restore, /api/history-svg) of its embedded sidecar, so a large payload (e.g. 500 MiB) could exhaust the Node.js heap and crash the MCP server. The issue is fixed in version 0.4.15.

Disclosed 21 April 2026 · Record updated 1 October 2026

Impact

Out-of-memory denial of service crashing the MCP server hosting the AI diagram integration.

Our coverage

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-40608