High advisory for tsParticles
CVE-2026-63655 · Reported 4 Nov 2026
Full advisory details, affected packages, severity context, and original source.
Affected technology
Advisory overview
tsParticles is a TypeScript library for creating highly customizable particle animations. Prior to 4.3.1, the HTTP mode of @tsparticles/mcp-server accepts unauthenticated POST /mcp requests in integrations/mcp-server/src/index.ts and accumulates every request-body chunk in a Buffer[] without a cumulative size limit before Buffer.concat and JSON.parse. A remote attacker can stream an arbitrarily large body to exhaust Node.js process memory and terminate the service, including in the official Docker configuration that exposes HTTP mode on 0.0.0.0:3000. Confidentiality and integrity are not affected. This issue is fixed in version 4.3.1.
Related references
- https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b
- https://github.com/tsparticles/tsparticles/commit/7b3a9488d4201fe9ddd5fec05f4a2ae65d3627ea
- https://github.com/tsparticles/tsparticles/pull/5875
- https://github.com/tsparticles/tsparticles/releases/tag/v4.3.1
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq