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.
History

Fri, 06 Nov 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Tsparticles
Tsparticles mcp-server
Tsparticles tsparticles
Vendors & Products Tsparticles
Tsparticles mcp-server
Tsparticles tsparticles

Fri, 06 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 04 Nov 2026 22:15:00 +0000

Type Values Removed Values Added
Description 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.
Title tsParticles: Unbounded HTTP Request Body Buffering in @tsparticles/mcp-server Leads to Remote DoS
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-11-04T22:01:50.183Z

Updated: 2026-11-05T20:19:03.619Z

Reserved: 2026-07-17T14:47:08.031Z

Link: CVE-2026-63655

cve-icon Vulnrichment

Updated: 2026-11-05T20:18:59.219Z

cve-icon NVD

Status : Deferred

Published: 2026-11-04T22:18:07.350

Modified: 2026-11-06T21:32:18.733

Link: CVE-2026-63655

cve-icon Redhat

No data.