CVE-2026-63655 Details
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.
A denial-of-service vulnerability has been identified in the @tsparticles/mcp-server package, prior to version 4.3.1. The issue arises because the server's HTTP mode accepts unauthenticated POST requests to the /mcp endpoint and buffers the entire request body in memory without any size limit. This unbounded buffering can be exploited by remote attackers to exhaust the Node.js process memory, leading to service termination. The vulnerability is present in the official Docker configuration, which exposes the HTTP mode on all network interfaces by default.
Users can update to tsParticles version 4.3.1 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 4, 2026CISA-ADP
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b | [email protected] | Source CodeVendor |
| https://github.com/tsparticles/tsparticles/commit/7b3a9488d4201fe9ddd5fec05f4a2ae65d3627ea | [email protected] | Source CodeVendor |
| https://github.com/tsparticles/tsparticles/pull/5875 | [email protected] | Issue TrackingVendor |
| https://github.com/tsparticles/tsparticles/releases/tag/v4.3.1 | [email protected] | Release NotesVendor |
| https://github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tsParticles | All versions |
CPE
Remediation
| |
| tsParticles MCP Server | <= 4.3.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | CVE Modified | CISA-ADP |
| Nov 4, 2026 | New CVE Received | [email protected] |