CVE-2026-111770
High
Description
MCP TypeScript server SDK: Shared transport or server instances delivered one HTTP client's messages to another
SeverityHigh
CVSS7.7
Exploit probability—
Product@modelcontextprotocol/server
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-362Race condition
How to fix
Update
- @modelcontextprotocol/server2.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @modelcontextprotocol/servernpm | 2.0.0 ≤ v < 2.3.0 | 2.3.0 |
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