CVE-2026-76892

tsParticles: Malformed JSON requests can terminate the @tsparticles/mcp-server HTTP process

8.7 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.29%Unchanged since Nov 5, 2026

What each source reports

CVE List Score used 8.7

tsParticles: Malformed JSON requests can terminate the @tsparticles/mcp-server HTTP process

Record: CVE-2026-76892
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-248
Updated: 2026-11-05

EUVDEUVD-2026-117159 8.7

Record: EUVD-2026-117159
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-05

NVD 8.7

Record: CVE-2026-76892
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-248
Updated: 2026-11-07

OSV 8.7

tsParticles: Malformed JSON requests can terminate the @tsparticles/mcp-server HTTP process

Record: CVE-2026-76892
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-248
Updated: 2026-11-07

Affected products

History

History
Recorded	Changed	Sources
Nov 5, 2026	references	CVE List, EUVD
Nov 5, 2026	aliases, references	NVD, OSV
Nov 4, 2026	aliases, products, published	EUVD
Nov 4, 2026	first indexed	CVE List

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-76892 is a high vulnerability (CVSS 8.7) in @contentful Mcp-server, published November 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. No source names a fixed version.