MEDIUM 6.9 NVD
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 st
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.
References
- https://github.com/tsparticles/tsparticles/commit/d3b5672bd61bb847abfa21193c34eabf7aba6896
- https://github.com/tsparticles/tsparticles/pull/5888
- https://github.com/tsparticles/tsparticles/security/advisories/GHSA-h7c4-q426-7jh9
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-11-04 via NVD.
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