# CVE-2026-76892: tsParticles MCP server denial of service via malformed JSON

Source: https://junglewise.ai/threats/cve-2026-76892-tsparticles-is-a-typescript-library-for-creating-highly  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04. Updated: 2026-11-04  
License: CC BY 4.0 with a link back

CVE-2026-76892 · Severity: high · CVSS 4 · Published 2026-11-04

tsParticles is a library that creates particle animations and includes an HTTP-based Model Context Protocol (MCP) server for remote integration. An attacker can send a single malformed JSON request to crash the entire Node.js process, causing the service to become unavailable until manually restarted. This allows an unauthenticated remote user to disrupt the service with minimal effort.

Technologies: [@tsparticles/mcp-server (npm)](https://junglewise.ai/threats/technologies/npm-tsparticles-mcp-server), [tsParticles @Tsparticles/Mcp-Server](https://junglewise.ai/threats/technologies/tsparticles-mcp-server). Vendors: [npm](https://junglewise.ai/threats/vendors/npm), [tsParticles](https://junglewise.ai/threats/vendors/tsparticles).

## Quick answers

**Is CVE-2026-76892 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76892 being exploited in the wild.

**How severe is CVE-2026-76892?** High severity, with a CVSS score of 4, published 4 November 2026.

**Which products and versions are affected?** @tsparticles/mcp-server (npm) <= 4.3.0, SEMVER:introduced=0,fixed=4.3.1; tsParticles @Tsparticles/Mcp-Server prior to 4.3.1.

**Is there a fix for CVE-2026-76892?** Yes. @tsparticles/mcp-server (npm): upgrade to 4.3.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-76892 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-76892?** Check whether you run @tsparticles/mcp-server (npm) or tsParticles @Tsparticles/Mcp-Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- @tsparticles/mcp-server (npm): upgrade to 4.3.1 or later

  ```sh
  npm install @tsparticles/mcp-server@4.3.1
  ```


## Technical details

The vulnerability exists in the POST /mcp endpoint of @tsparticles/mcp-server prior to version 4.3.1, where JSON.parse is called outside a proper error boundary, causing an unhandled SyntaxError on malformed input. The attack requires only network access and a malformed JSON body; no authentication or user interaction is needed. A single request terminates the Node.js process, rendering the MCP service unavailable until external restart.

## Affected products

- tsparticles @tsparticles/mcp-server prior to 4.3.1

## Identifiers

- CVE-2026-76892
- GHSA-4p8p-pjpq-2w7h

## Timeline

- 2026-11-04: disclosed
- 2026-07-01: patched

## References

- [https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b](https://github.com/tsparticles/tsparticles/commit/25fb70e7f527a91568adaef576570289083f243b)
- [https://github.com/tsparticles/tsparticles/pull/5875](https://github.com/tsparticles/tsparticles/pull/5875)

## Related threats

- [tsParticles MCP server HTTP session state reuse denial of service](https://junglewise.ai/threats/cve-2026-76893-tsparticles-is-a-typescript-library-for-creating-highly)
- [tsParticles MCP server denial of service via unbounded buffer allocation](https://junglewise.ai/threats/cve-2026-63655-tsparticles-is-a-typescript-library-for-creating-highly)