CVE-2026-63655

HIGH 7.5

tsParticles: Unbounded HTTP Request Body Buffering in @tsparticles/mcp-server Leads to Remote DoS

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400
Vendor	tsparticles
Product	tsparticles
Published	Nov 4, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

tsparticles / tsparticles

< 4.3.1

@tsparticles / mcp-server

< 4.3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq github.com: https://github.com/tsparticles/tsparticles/pull/5875 github.com: https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b github.com: https://github.com/tsparticles/tsparticles/commit/7b3a9488d4201fe9ddd5fec05f4a2ae65d3627ea github.com: https://github.com/tsparticles/tsparticles/releases/tag/v4.3.1