CVE-2026-76893
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
74/100
Published: 2026-11-04
Modified: 2026-11-06
First seen: 2026-11-04
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
X
AT:
None
VC:
None
VI:
None
VA:
Low
Description
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.
Weakness Classification (1)
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| @tsparticles | mcp-server | < 4.3.2 |
| @tsparticles | mcp-server | < 4.3.2 |
| tsparticles | tsparticles | < 4.3.2 |
| tsparticles | tsparticles | < 4.3.2 |