# @modelcontextprotocol/sdk (npm) vulnerabilities

6 known vulnerabilities (6 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 1.32.2 (Oct 23, 2026): no advisory affects it
- Newest unaffected release: 1.32.2 (Oct 23, 2026), the latest release
- Weekly downloads: 87M
- Dependents: 85.3K
- Releases: 84 since 0.4.0 (Nov 11, 2024)
- Registry: https://www.npmjs.com/package/@modelcontextprotocol/sdk
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- GHSA-F897-62HF-6GXQ: 1.10.0 to 1.30.0 (1.30.1 is outside it)
- CVE-2026-111767: 1.24.0 to 1.31.0 (1.32.0 is outside it)
- CVE-2026-104850: 1.12.0 to 1.30.1 (1.31.0 is outside it)
- CVE-2026-25536: 1.10.0 to 1.25.3 (1.26.0 is outside it)
- CVE-2026-0621: 1.3.0 to 1.25.1 (1.25.2 is outside it)
- CVE-2025-66414: 0.4.0 to 1.23.1 (1.24.0 is outside it)

## Advisories (6)

### [GHSA-F897-62HF-6GXQ](https://cve.now/GHSA-F897-62HF-6GXQ): MCP TypeScript SDK: HTTP server transports and handlers did not limit request body size or JSON-RPC batch length

- Severity: High
- Published: Oct 27, 2026
- Affected: from 1.10.0, fixed in 1.30.1.
- Fixed in 1.30.1 (released Sep 23, 2026, 34 days before disclosure).
- The latest release, 1.32.2, is not affected.
- 47% of @modelcontextprotocol/sdk downloads last week were affected versions (42.5M).

### [CVE-2026-111767](https://cve.now/CVE-2026-111767): MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

- Severity: High 8.6
- Published: Oct 20, 2026
- Affected: from 1.24.0, fixed in 1.32.0.
- Fixed in 1.32.0 (released Oct 2, 2026, 18 days before disclosure).
- The latest release, 1.32.2, is not affected.
- 39% of @modelcontextprotocol/sdk downloads last week were affected versions (35.6M).

### [CVE-2026-104850](https://cve.now/CVE-2026-104850): MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server

- Severity: High 7.5
- Published: Oct 6, 2026
- Affected: from 1.12.0, fixed in 1.31.0.
- Fixed in 1.31.0 (released Sep 28, 2026, 8 days before disclosure).
- The latest release, 1.32.2, is not affected.
- 47% of @modelcontextprotocol/sdk downloads last week were affected versions (43.1M).

### [CVE-2026-25536](https://cve.now/CVE-2026-25536): @modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

- Severity: High 7.1
- Published: Feb 4, 2026
- Affected: from 1.10.0, fixed in 1.26.0.
- Fixed in 1.26.0 (released Feb 4, 2026, the day of disclosure).
- The latest release, 1.32.2, is not affected.
- 13% of @modelcontextprotocol/sdk downloads last week were affected versions (11.6M).

### [CVE-2026-0621](https://cve.now/CVE-2026-0621): MCP TypeScript SDK UriTemplate Exploded Array Pattern ReDoS

- Severity: High 8.7
- Published: Jan 5, 2026
- Affected: from 1.3.0, fixed in 1.25.2.
- Fixed in 1.25.2 (released Jan 7, 2026, 2 days after disclosure).
- The latest release, 1.32.2, is not affected.
- 13% of @modelcontextprotocol/sdk downloads last week were affected versions (11.4M).

### [CVE-2025-66414](https://cve.now/CVE-2025-66414): DNS Rebinding Protection Disabled by Default in Model Context Protocol TypeScript SDK for Servers Running on Localhost

- Severity: High 7.6
- Published: Dec 2, 2025
- Affected: fixed in 1.24.0.
- Fixed in 1.24.0 (released Dec 2, 2025, the day of disclosure).
- The latest release, 1.32.2, is not affected.
- 13% of @modelcontextprotocol/sdk downloads last week were affected versions (11.8M).

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