Resource exhaustion in @Tsparticles Mcp-Server
CVE-2026-76893
tsParticles is a TypeScript library for creating highly customizable particle animations. Prior to 4.3.2, the HTTP mode of @tsparticles/mcp-server reuses one stateful StreamableHTTPServerTransport for every client. An unauthenticated client that sends the first initialize request without an mcp-session-id claims the shared transport state, causing later independent clients to receive Server already initialized and preventing them from establishing sessions until the process restarts. The first client's session remains functional. This issue is fixed in version 4.3.2.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
EPSS exploit prediction
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Affected products
- @Tsparticles Mcp-Server — versions < 4.3.2
- Tsparticles — versions < 4.3.2