---
id: CVE-2026-76892
title: >-
  tsParticles: Malformed JSON requests can terminate the @tsparticles/mcp-server
  HTTP process
summary: >-
  tsParticles is a TypeScript library for creating highly customizable particle
  animations. Prior to 4.3.1, the HTTP mode of @tsparticles/mcp-server calls
  JSON.parse outside a request-local error boundary in the POST /mcp handler in
  integr…
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-248
vendor: tsparticles
product: tsparticles
affected:
  - tsparticles < 4.3.1
  - mcp-server < 4.3.1
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-05T20:24:21.547245Z'
exploitAvailable: true
published: '2026-11-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:25:01.240Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-76892'
references:
  - url: >-
      https://github.com/tsparticles/tsparticles/security/advisories/GHSA-4p8p-pjpq-2w7h
    label: >-
      https://github.com/tsparticles/tsparticles/security/advisories/GHSA-4p8p-pjpq-2w7h
  - url: 'https://github.com/tsparticles/tsparticles/pull/5875'
    label: 'https://github.com/tsparticles/tsparticles/pull/5875'
  - url: >-
      https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b
    label: >-
      https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b
tags:
  - cve.org
  - exploit-available
epss: 0.00291
epssPercentile: 0.21843
ingestedAt: '2026-11-05T22:38:31.790Z'
---

## Overview

tsParticles is a TypeScript library for creating highly customizable particle animations. Prior to 4.3.1, the HTTP mode of @tsparticles/mcp-server calls JSON.parse outside a request-local error boundary in the POST /mcp handler in integrations/mcp-server/src/index.ts. A single unauthenticated malformed JSON body raises a SyntaxError that terminates the Node.js process, leaving the MCP service unavailable until an external supervisor restarts it. This issue is fixed in version 4.3.1.

## Affected

- `tsparticles < 4.3.1`
- `mcp-server < 4.3.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.