CVE-2026-63655
tsParticles: Unbounded HTTP Request Body Buffering in @tsparticles/mcp-server Leads to Remote DoS
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.
Fixes and workarounds
Fix
@tsparticles/mcp-server (npm): GitHub reports patched versions 4.3.1. Check the advisory for the affected release branch.
Source: GitHub GHSA-447x-qqwf-m7xqAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| tsparticles tsparticles |
< 4.3.1 (affected) | CNA: GitHub_M |
| mcp-server @tsparticles |
< 4.3.1 (affected) | CNA: GitHub_M |
@tsparticles/mcp-server@tsparticles/mcp-server
npm |
<= 4.3.0 (affected, GitHub advisory range) | GitHub GHSA-447x-qqwf-m7xq |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: GitHub_M |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD: [email protected] |
Exploit evidence
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq
exploit · ADP: CISA-ADP
References
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xqCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/tsparticles/tsparticles/pull/5875CNA: GitHub_M · x_refsource_MISC
- https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243bCNA: GitHub_M · x_refsource_MISC
- https://github.com/tsparticles/tsparticles/commit/7b3a9488d4201fe9ddd5fec05f4a2ae65d3627eaCNA: GitHub_M · x_refsource_MISC
- https://github.com/tsparticles/tsparticles/releases/tag/v4.3.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xqADP: CISA-ADP · exploit
- https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b[email protected]
- https://github.com/tsparticles/tsparticles/commit/7b3a9488d4201fe9ddd5fec05f4a2ae65d3627ea[email protected]
- https://github.com/tsparticles/tsparticles/pull/5875[email protected]
- https://github.com/tsparticles/tsparticles/releases/tag/v4.3.1[email protected]
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq[email protected]
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xqGitHub Security Advisories · advisory
For agents and automation
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