Vendor
Model Context Protocol vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 15 vulnerabilities in Model Context Protocol: 0 in the last 7 days and 7 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-53937, was published on 9 September 2026. 2 technologies have a page of their own.
- Last 7 days
- 0
- Last 90 days
- 7
- Critical, all time
- 0
- Exploited in the wild
- 0
About Model Context Protocol
The Model Context Protocol is an open standard for connecting AI models to data sources and tools.
Model Context Protocol technologies
Latest Model Context Protocol vulnerabilities
- CVE-2026-53937: MCP Kotlin SDK unbounded memory growth in ReadBuffermediumCVSS 6.2EPSS 0.2%
- CVE-2026-19753: Model Context Protocol mcp-rdf-explorer SSRF in explore_urlhighCVSS 7.3EPSS 0.5%
- CVE-2026-67431: modelcontextprotocol ruby-sdk session hijacking in StreamableHTTPTransporthighCVSS 8.3EPSS 0.3%
- CVE-2026-67430: Model Context Protocol Ruby SDK memory exhaustion in StreamableHTTPTransportmediumCVSS 5.3EPSS 0.3%
- CVE-2026-59950: modelcontextprotocol python-sdk missing origin validation in WebSocket transporthighCVSS 7.6EPSS 0.2%
- CVE-2026-52870: Model Context Protocol Python SDK missing authorization in experimental taskshighCVSS 7.6EPSS 0.4%
- CVE-2026-52869: modelcontextprotocol mcp authorization bypass in SSE and HTTP transportshighCVSS 7.1EPSS 0.5%
- CVE-2026-44428: Model Context Protocol Registry OIDC token replay via shared audiencemediumCVSS 4.7EPSS 0.0%
- CVE-2026-44427: Model Context Protocol Registry open redirect in TrailingSlashMiddlewaremediumCVSS 0EPSS 0.0%
- CVE-2026-45781: Model Context Protocol Registry ownership bypass in OCI validatorlowCVSS 3.5EPSS 0.0%
- CVE-2026-44430: Model Context Protocol Registry SSRF via IPv6 Filter BypassmediumCVSS 4EPSS 0.0%
- CVE-2026-44429: MCP Registry stored XSS in catalogue UI via websiteUrlmediumCVSS 5.4EPSS 0.1%
- CVE-2026-42559: Model Context Protocol RMCP DNS rebinding in Streamable HTTP serverhighCVSS 8.8EPSS 0.2%
- CVE-2026-34237: Model Context Protocol Java SDK hardcoded wildcard CORS policymediumCVSS 6.1EPSS 0.0%
- CVE-2026-25536: Model Context Protocol TypeScript SDK data leak in McpServer transporthighCVSS 7.1EPSS 0.4%
Most severe Model Context Protocol vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-42559: Model Context Protocol RMCP DNS rebinding in Streamable HTTP serverhighCVSS 8.8EPSS 0.2%
- CVE-2026-67431: modelcontextprotocol ruby-sdk session hijacking in StreamableHTTPTransporthighCVSS 8.3EPSS 0.3%
- CVE-2026-52870: Model Context Protocol Python SDK missing authorization in experimental taskshighCVSS 7.6EPSS 0.4%
- CVE-2026-59950: modelcontextprotocol python-sdk missing origin validation in WebSocket transporthighCVSS 7.6EPSS 0.2%
- CVE-2026-19753: Model Context Protocol mcp-rdf-explorer SSRF in explore_urlhighCVSS 7.3EPSS 0.5%
- CVE-2026-52869: modelcontextprotocol mcp authorization bypass in SSE and HTTP transportshighCVSS 7.1EPSS 0.5%
- CVE-2026-25536: Model Context Protocol TypeScript SDK data leak in McpServer transporthighCVSS 7.1EPSS 0.4%
- CVE-2026-53937: MCP Kotlin SDK unbounded memory growth in ReadBuffermediumCVSS 6.2EPSS 0.2%
- CVE-2026-34237: Model Context Protocol Java SDK hardcoded wildcard CORS policymediumCVSS 6.1EPSS 0.0%
- CVE-2026-44429: MCP Registry stored XSS in catalogue UI via websiteUrlmediumCVSS 5.4EPSS 0.1%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 3 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 2 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 1 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 1 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/model-context-protocol.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Model Context Protocol vulnerabilities", https://junglewise.ai/threats/vendors/model-context-protocol, 26 September 2026.