Technology · Anthropic
Anthropic Model Context Protocol vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in Anthropic Model Context Protocol: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-59951, was published on 14 October 2026. 1 vulnerability in the last four weeks, down 50% on the four before (2).
- Last 7 days
- 0
- Last 90 days
- 3
- Critical, all time
- 0
- Exploited in the wild
- 0
About Anthropic Model Context Protocol
Model Context Protocol is an open standard for connecting AI models to external tools and data sources.
Latest Anthropic Model Context Protocol vulnerabilities
- CVE-2026-59951: MCP Python SDK unbounded session accumulation in StreamableHTTPhighCVSS 7.5EPSS 0.5%
- CVE-2026-63128: RMCP Streamable HTTP server unauthenticated session-table memory leakhighCVSS 7.5EPSS 0.6%
- CVE-2026-63127: RMCP missing resource field validation in OAuth metadatahighCVSS 8.2EPSS 0.2%
- CVE-2026-67432: Model Context Protocol Ruby SDK memory exhaustion in StreamableHTTPTransporthighCVSS 7.5EPSS 0.8%
- CVE-2026-59950: modelcontextprotocol python-sdk missing origin validation in WebSocket transporthighCVSS 4EPSS 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-2026-42559: Model Context Protocol RMCP DNS rebinding in Streamable HTTP serverhighCVSS 8.8EPSS 0.2%
- CVE-2026-25536: Model Context Protocol TypeScript SDK data leak in McpServer transporthighCVSS 7.1EPSS 0.4%
- CVE-2025-66416: Model Context Protocol Python SDK DNS rebinding in HTTP servershighCVSS 8.1EPSS 0.5%
- CVE-2025-53365: Model Context Protocol Python SDK denial of service in HTTP transporthighCVSS 4EPSS 0.4%
Most severe Anthropic 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-2026-63127: RMCP missing resource field validation in OAuth metadatahighCVSS 8.2EPSS 0.2%
- CVE-2025-66416: Model Context Protocol Python SDK DNS rebinding in HTTP servershighCVSS 8.1EPSS 0.5%
- CVE-2026-52870: Model Context Protocol Python SDK missing authorization in experimental taskshighCVSS 7.6EPSS 0.4%
- CVE-2026-67432: Model Context Protocol Ruby SDK memory exhaustion in StreamableHTTPTransporthighCVSS 7.5EPSS 0.8%
- CVE-2026-63128: RMCP Streamable HTTP server unauthenticated session-table memory leakhighCVSS 7.5EPSS 0.6%
- CVE-2026-59951: MCP Python SDK unbounded session accumulation in StreamableHTTPhighCVSS 7.5EPSS 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-2025-53365: Model Context Protocol Python SDK denial of service in HTTP transporthighCVSS 4EPSS 0.4%
Vulnerabilities per week
1 vulnerability in the last four weeks, down 50% on the four before (2). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 2 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 1 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Anthropic Model Context Protocol vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/model-context-protocol)<a href="https://junglewise.ai/threats/technologies/model-context-protocol"><img src="https://junglewise.ai/threats/technologies/model-context-protocol/badge.svg" alt="Anthropic Model Context Protocol vulnerabilities" /></a>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/technologies/model-context-protocol.json, and this page as text at https://junglewise.ai/threats/technologies/model-context-protocol.md, 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, "Anthropic Model Context Protocol vulnerabilities", https://junglewise.ai/threats/technologies/model-context-protocol, 11 November 2026.