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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63655
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 22:18:07 UTC
Updated2026-11-06 21:32:18 UTC
DescriptiontsParticles 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.004310000 probability, percentile 0.376070000 (date 2026-11-08)

Problem Types: CWE-400 | CWE-400 CWE-400: Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tsparticles Tsparticles affected < 4.3.1 Not specified
CNA @tsparticles Mcp-server affected < 4.3.1 Not specified

References

ReferenceSourceLinkTags
github.com/tsparticles/tsparticles/commit/7b3a9488d4201fe9ddd5fec05f4a2a... [email protected] github.com
github.com/tsparticles/tsparticles/releases/tag/v4.3.1 [email protected] github.com
github.com/tsparticles/tsparticles/security/advisories/GHSA-447x-qqwf-m7xq 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/tsparticles/tsparticles/pull/5875 [email protected] github.com
github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef5765702... [email protected] github.com
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