Denial of Service Vulnerability in tsParticles Library by tsparticles
CVE-2026-76892

8.7HIGH

Key Information:

Vendor

Tsparticles

Status
Tsparticles
Mcp-server
Vendor
CVE Published:
4 November 2026

What is CVE-2026-76892?

The tsParticles library, used for creating particle animations, has a vulnerability in the MCP server HTTP mode. In versions before 4.3.1, the POST /mcp handler is susceptible to receiving a malformed JSON payload, causing JSON.parse to throw a SyntaxError outside of an error boundary. This can lead to an abrupt termination of the Node.js process, resulting in service unavailability until a manual restart is performed. This issue has been resolved in version 4.3.1, ensuring greater resilience against such attacks.

Affected Version(s)

mcp-server < 4.3.1

tsparticles < 4.3.1

References

https://github.com/tsparticles/tsparticles/security/advis...
x_refsource_CONFIRM
https://github.com/tsparticles/tsparticles/pull/5875
x_refsource_MISC
https://github.com/tsparticles/tsparticles/commit/25fb70e...
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.