# Anthropic @Modelcontextprotocol/Sdk vulnerabilities

Source: https://junglewise.ai/threats/technologies/anthropic-modelcontextprotocol-sdk  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/anthropic-modelcontextprotocol-sdk.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Anthropic @Modelcontextprotocol/Sdk: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-111769, was published on 5 November 2026. 3 vulnerabilities in the last four weeks, up 200% on the four before (1).

## Counts

- Last 7 days: 0
- Last 30 days: 3
- Last 90 days: 4
- All time: 4 (0 critical, 0 exploited in the wild)

## About Anthropic @Modelcontextprotocol/Sdk

Software development kit for building Model Context Protocol servers and clients.

## Latest Anthropic @Modelcontextprotocol/Sdk vulnerabilities

- [CVE-2026-111769: MCP TypeScript client SDK credential leak via cross-origin redirects](https://junglewise.ai/threats/cve-2026-111769-mcp-typescript-client-sdk-http-client-transports-and-oauth) (medium, CVSS 6.5, published 5 Nov 2026)
- [CVE-2026-111768: MCP TypeScript SDK memory exhaustion via unbounded validation](https://junglewise.ai/threats/cve-2026-111768-mcp-typescript-sdk-one-http-request-within-the-default-size) (high, CVSS 7.5, published 5 Nov 2026)
- [CVE-2026-111771: MCP TypeScript SDK bearer authentication token validation bypass](https://junglewise.ai/threats/cve-2026-111771-mcp-typescript-sdk-server-bearer-authentication-accepted-tokens) (medium, CVSS 6.8, published 5 Nov 2026)
- [CVE-2026-104850: MCP TypeScript SDK OAuth client credential injection via untrusted server](https://junglewise.ai/threats/cve-2026-104850-mcp-typescript-sdk-oauth-client-could-send-credentials-to-an) (high, CVSS 7.5, published 6 Oct 2026)

## Most severe Anthropic @Modelcontextprotocol/Sdk vulnerabilities

- [CVE-2026-111768: MCP TypeScript SDK memory exhaustion via unbounded validation](https://junglewise.ai/threats/cve-2026-111768-mcp-typescript-sdk-one-http-request-within-the-default-size) (high, CVSS 7.5, published 5 Nov 2026)
- [CVE-2026-104850: MCP TypeScript SDK OAuth client credential injection via untrusted server](https://junglewise.ai/threats/cve-2026-104850-mcp-typescript-sdk-oauth-client-could-send-credentials-to-an) (high, CVSS 7.5, published 6 Oct 2026)
- [CVE-2026-111771: MCP TypeScript SDK bearer authentication token validation bypass](https://junglewise.ai/threats/cve-2026-111771-mcp-typescript-sdk-server-bearer-authentication-accepted-tokens) (medium, CVSS 6.8, published 5 Nov 2026)
- [CVE-2026-111769: MCP TypeScript client SDK credential leak via cross-origin redirects](https://junglewise.ai/threats/cve-2026-111769-mcp-typescript-client-sdk-http-client-transports-and-oauth) (medium, CVSS 6.5, published 5 Nov 2026)

## Vulnerabilities per week

3 vulnerabilities in the last four weeks, up 200% on the four before (1).

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 1 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 3 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Anthropic technologies

- [Anthropic Claude Code](https://junglewise.ai/threats/technologies/claude-code): 31 vulnerabilities
- [Anthropic Model Context Protocol](https://junglewise.ai/threats/technologies/model-context-protocol): 11 vulnerabilities
- [Anthropic Claude Desktop](https://junglewise.ai/threats/technologies/claude-desktop): 6 vulnerabilities
- [Anthropic Model Context Protocol SDK (TypeScript)](https://junglewise.ai/threats/technologies/model-context-protocol-sdk-typescript): 5 vulnerabilities
- [Anthropic Claude Agent SDK](https://junglewise.ai/threats/technologies/claude-agent-sdk): 4 vulnerabilities
- [Anthropic Model Context Protocol Python SDK](https://junglewise.ai/threats/technologies/anthropic-model-context-protocol-python-sdk): 3 vulnerabilities
- [Anthropic Claude Code CLI](https://junglewise.ai/threats/technologies/claude-code-cli): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Anthropic @Modelcontextprotocol/Sdk vulnerabilities", https://junglewise.ai/threats/technologies/anthropic-modelcontextprotocol-sdk, 13 November 2026.