Resource exhaustion in @Tsparticles Mcp-Server
CVE-2026-63655
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- @Tsparticles Mcp-Server — versions < 4.3.1
- Tsparticles — versions < 4.3.1
Weakness classification (CWE)
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
Frequently asked questions
- What is CVE-2026-63655?
- CVE-2026-63655 is a high-severity vulnerability in @Tsparticles Mcp-Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-11-04.
- How severe is CVE-2026-63655?
- High severity. CVSS v3 base score is 7.5 out of 10.