# Model Context Protocol vulnerabilities Source: https://junglewise.ai/threats/vendors/model-context-protocol Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/model-context-protocol.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 20 vulnerabilities in Model Context Protocol: 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-2026-111770, was published on 5 November 2026. 5 vulnerabilities in the last four weeks, up from none in the four before. 2 technologies have a page of their own. ## Counts - Last 7 days: 0 - Last 30 days: 5 - Last 90 days: 6 - All time: 20 (0 critical, 0 exploited in the wild) ## About Model Context Protocol The Model Context Protocol is an open standard for connecting AI models to data sources and tools. ## Latest Model Context Protocol vulnerabilities - [CVE-2026-111770: MCP TypeScript server SDK cross-client message delivery in shared HTTP transport](https://junglewise.ai/threats/cve-2026-111770-mcp-typescript-server-sdk-shared-transport-or-server-instances) (high, CVSS 7.7, 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) - [rmcp OAuth client SSRF via unresolved hostnames](https://junglewise.ai/threats/rustsec-2026-0457-oauth-client-ssrf-filter-checks-host-strings-not-26bba63d) (info, published 22 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-2026-108395: Model Context Protocol Java SDK unbounded HTTP request body read](https://junglewise.ai/threats/cve-2026-108395-the-model-context-protocol-java-sdk-is-the-official-java-sdk-for) (high, CVSS 7.5, published 14 Oct 2026) - [CVE-2026-53937: MCP Kotlin SDK unbounded memory growth in ReadBuffer](https://junglewise.ai/threats/cve-2026-53937-mcp-kotlin-sdk-unbounded-memory-growth-in-readbuffer) (medium, CVSS 6.2, published 9 Sep 2026) - [CVE-2026-19753: Model Context Protocol mcp-rdf-explorer SSRF in explore_url](https://junglewise.ai/threats/cve-2026-19753-model-context-protocol-mcp-rdf-explorer-ssrf-in-explore-url) (high, CVSS 7.3, published 13 Aug 2026) - [CVE-2026-67431: modelcontextprotocol ruby-sdk session hijacking in StreamableHTTPTransport](https://junglewise.ai/threats/cve-2026-67431-modelcontextprotocol-ruby-sdk-session-hijacking-in) (high, CVSS 4, published 29 Jul 2026) - [CVE-2026-67430: Model Context Protocol Ruby SDK memory exhaustion in StreamableHTTPTransport](https://junglewise.ai/threats/cve-2026-67430-model-context-protocol-ruby-sdk-memory-exhaustion-in) (medium, CVSS 5.3, published 29 Jul 2026) - [CVE-2026-59950: modelcontextprotocol python-sdk missing origin validation in WebSocket transport](https://junglewise.ai/threats/cve-2026-59950-modelcontextprotocol-python-sdk-missing-origin-validation-in) (high, CVSS 4, published 15 Jul 2026) - [CVE-2026-52870: Model Context Protocol Python SDK missing authorization in experimental tasks](https://junglewise.ai/threats/cve-2026-52870-model-context-protocol-python-sdk-missing-authorization-in) (high, CVSS 7.6, published 15 Jul 2026) - [CVE-2026-52869: modelcontextprotocol mcp authorization bypass in SSE and HTTP transports](https://junglewise.ai/threats/cve-2026-52869-modelcontextprotocol-mcp-authorization-bypass-in-sse-and-http) (high, CVSS 7.1, published 15 Jul 2026) - [CVE-2026-44428: Model Context Protocol Registry OIDC token replay via shared audience](https://junglewise.ai/threats/cve-2026-44428-model-context-protocol-registry-oidc-token-replay-via-shared) (medium, CVSS 4.7, published 14 May 2026) - [CVE-2026-44427: Model Context Protocol Registry open redirect in TrailingSlashMiddleware](https://junglewise.ai/threats/cve-2026-44427-model-context-protocol-registry-open-redirect-in) (medium, CVSS 4, published 14 May 2026) - [CVE-2026-45781: Model Context Protocol Registry ownership bypass in OCI validator](https://junglewise.ai/threats/cve-2026-45781-model-context-protocol-registry-ownership-bypass-in-oci-validator) (low, CVSS 3.5, published 14 May 2026) - [CVE-2026-44430: Model Context Protocol Registry SSRF via IPv6 Filter Bypass](https://junglewise.ai/threats/cve-2026-44430-model-context-protocol-registry-ssrf-via-ipv6-filter-bypass) (medium, CVSS 4, published 14 May 2026) - [CVE-2026-44429: MCP Registry stored XSS in catalogue UI via websiteUrl](https://junglewise.ai/threats/cve-2026-44429-mcp-registry-stored-xss-in-catalogue-ui-via-websiteurl) (medium, CVSS 5.4, published 14 May 2026) - [CVE-2026-42559: Model Context Protocol RMCP DNS rebinding in Streamable HTTP server](https://junglewise.ai/threats/cve-2026-42559-model-context-protocol-rmcp-dns-rebinding-in-streamable-http) (high, CVSS 8.8, published 14 May 2026) - [CVE-2026-34237: Model Context Protocol Java SDK hardcoded wildcard CORS policy](https://junglewise.ai/threats/cve-2026-34237-model-context-protocol-java-sdk-hardcoded-wildcard-cors-policy) (medium, CVSS 6.1, published 31 Mar 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) ## Most severe Model Context Protocol vulnerabilities - [CVE-2026-42559: Model Context Protocol RMCP DNS rebinding in Streamable HTTP server](https://junglewise.ai/threats/cve-2026-42559-model-context-protocol-rmcp-dns-rebinding-in-streamable-http) (high, CVSS 8.8, published 14 May 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-2026-111770: MCP TypeScript server SDK cross-client message delivery in shared HTTP transport](https://junglewise.ai/threats/cve-2026-111770-mcp-typescript-server-sdk-shared-transport-or-server-instances) (high, CVSS 7.7, published 5 Nov 2026) - [CVE-2026-52870: Model Context Protocol Python SDK missing authorization in experimental tasks](https://junglewise.ai/threats/cve-2026-52870-model-context-protocol-python-sdk-missing-authorization-in) (high, CVSS 7.6, published 15 Jul 2026) - [CVE-2026-108395: Model Context Protocol Java SDK unbounded HTTP request body read](https://junglewise.ai/threats/cve-2026-108395-the-model-context-protocol-java-sdk-is-the-official-java-sdk-for) (high, CVSS 7.5, published 14 Oct 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-2026-19753: Model Context Protocol mcp-rdf-explorer SSRF in explore_url](https://junglewise.ai/threats/cve-2026-19753-model-context-protocol-mcp-rdf-explorer-ssrf-in-explore-url) (high, CVSS 7.3, published 13 Aug 2026) - [CVE-2026-52869: modelcontextprotocol mcp authorization bypass in SSE and HTTP transports](https://junglewise.ai/threats/cve-2026-52869-modelcontextprotocol-mcp-authorization-bypass-in-sse-and-http) (high, CVSS 7.1, published 15 Jul 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-2026-67431: modelcontextprotocol ruby-sdk session hijacking in StreamableHTTPTransport](https://junglewise.ai/threats/cve-2026-67431-modelcontextprotocol-ruby-sdk-session-hijacking-in) (high, CVSS 4, published 29 Jul 2026) ## Vulnerabilities per week 5 vulnerabilities in the last four weeks, up from none in the four before. | 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 | 1 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 1 | 0 | 0 | | 19 Oct 2026 | 2 | 0 | 0 | | 26 Oct 2026 | 1 | 0 | 0 | | 2 Nov 2026 | 1 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Model Context Protocol technologies - [Model Context Protocol Registry](https://junglewise.ai/threats/technologies/registry): 5 vulnerabilities - [Model Context Protocol Python SDK](https://junglewise.ai/threats/technologies/mcp-python-sdk): 4 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, "Model Context Protocol vulnerabilities", https://junglewise.ai/threats/vendors/model-context-protocol, 13 November 2026.