# @modelcontextprotocol/sdk (npm) vulnerabilities Source: https://junglewise.ai/threats/technologies/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/modelcontextprotocol-sdk.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 9 vulnerabilities in @modelcontextprotocol/sdk (npm): 0 in the last 7 days and 6 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. 5 vulnerabilities in the last four weeks, up 400% on the four before (1). ## Counts - Last 7 days: 0 - Last 30 days: 5 - Last 90 days: 6 - All time: 9 (0 critical, 0 exploited in the wild) ## About @modelcontextprotocol/sdk (npm) The official TypeScript SDK for implementing the Model Context Protocol to connect AI models with data sources. ## Latest @modelcontextprotocol/sdk (npm) 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) - [MCP TypeScript SDK denial of service via unbounded request body and JSON-RPC batch](https://junglewise.ai/threats/mcp-typescript-sdk-http-server-transports-and-handlers-did-not-limit-c51dda65) (high, CVSS 7.5, published 27 Oct 2026) - [CVE-2026-111767: MCP TypeScript SDK missing authorization in experimental tasks](https://junglewise.ai/threats/cve-2026-111767-mcp-typescript-sdk-experimental-tasks-were-not-tied-to-the) (high, CVSS 8.6, published 20 Oct 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-2026-25536: Model Context Protocol TypeScript SDK data leak in McpServer transport](https://junglewise.ai/threats/cve-2026-25536-model-context-protocol-typescript-sdk-data-leak-in-mcpserver) (high, CVSS 7.1, published 4 Feb 2026) - [CVE-2026-0621: Anthropic MCP TypeScript SDK ReDoS in UriTemplate](https://junglewise.ai/threats/cve-2026-0621-anthropic-mcp-typescript-sdk-redos-in-uritemplate) (high, CVSS 7.5, published 5 Jan 2026) - [CVE-2025-66414: Anthropic MCP TypeScript SDK DNS rebinding bypass on localhost](https://junglewise.ai/threats/cve-2025-66414-anthropic-mcp-typescript-sdk-dns-rebinding-bypass-on-localhost) (high, CVSS 8.1, published 2 Dec 2025) ## Most severe @modelcontextprotocol/sdk (npm) vulnerabilities - [CVE-2026-111767: MCP TypeScript SDK missing authorization in experimental tasks](https://junglewise.ai/threats/cve-2026-111767-mcp-typescript-sdk-experimental-tasks-were-not-tied-to-the) (high, CVSS 8.6, published 20 Oct 2026) - [CVE-2025-66414: Anthropic MCP TypeScript SDK DNS rebinding bypass on localhost](https://junglewise.ai/threats/cve-2025-66414-anthropic-mcp-typescript-sdk-dns-rebinding-bypass-on-localhost) (high, CVSS 8.1, published 2 Dec 2025) - [CVE-2026-0621: Anthropic MCP TypeScript SDK ReDoS in UriTemplate](https://junglewise.ai/threats/cve-2026-0621-anthropic-mcp-typescript-sdk-redos-in-uritemplate) (high, CVSS 7.5, published 5 Jan 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) - [MCP TypeScript SDK denial of service via unbounded request body and JSON-RPC batch](https://junglewise.ai/threats/mcp-typescript-sdk-http-server-transports-and-handlers-did-not-limit-c51dda65) (high, CVSS 7.5, published 27 Oct 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-2026-25536: Model Context Protocol TypeScript SDK data leak in McpServer transport](https://junglewise.ai/threats/cve-2026-25536-model-context-protocol-typescript-sdk-data-leak-in-mcpserver) (high, CVSS 7.1, published 4 Feb 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 5 vulnerabilities in the last four weeks, up 400% 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 | 1 | 0 | 0 | | 26 Oct 2026 | 1 | 0 | 0 | | 2 Nov 2026 | 3 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other npm technologies - [openclaw (npm)](https://junglewise.ai/threats/technologies/npm-openclaw): 214 vulnerabilities - [flowise (npm)](https://junglewise.ai/threats/technologies/flowise): 133 vulnerabilities - [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server): 117 vulnerabilities - [vm2 (npm)](https://junglewise.ai/threats/technologies/vm2): 111 vulnerabilities - [electron (npm)](https://junglewise.ai/threats/technologies/electron): 77 vulnerabilities - [ghost (npm)](https://junglewise.ai/threats/technologies/ghost): 74 vulnerabilities - [n8n (npm)](https://junglewise.ai/threats/technologies/npm-n8n): 64 vulnerabilities - [hono (npm)](https://junglewise.ai/threats/technologies/hono): 62 vulnerabilities - [directus (npm)](https://junglewise.ai/threats/technologies/directus): 61 vulnerabilities - [nocodb (npm)](https://junglewise.ai/threats/technologies/nocodb): 54 vulnerabilities - [undici (npm)](https://junglewise.ai/threats/technologies/undici): 53 vulnerabilities - [@budibase/server (npm)](https://junglewise.ai/threats/technologies/budibase-server): 42 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, "@modelcontextprotocol/sdk (npm) vulnerabilities", https://junglewise.ai/threats/technologies/modelcontextprotocol-sdk, 13 November 2026.