Technology · PyPI
mcp (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 10 vulnerabilities in mcp (PyPI): 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-2026-116686, was published on 27 October 2026. 4 vulnerabilities in the last four weeks, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 4
- Critical, all time
- 0
- Exploited in the wild
- 0
About mcp (PyPI)
Model Context Protocol implementation for tool and resource integration.
Latest mcp (PyPI) vulnerabilities
- CVE-2026-116686: Model Context Protocol Python SDK unvalidated $ref fetchingmediumCVSS 6.5EPSS 0.3%
- CVE-2026-116685: Model Context Protocol Python SDK credential and body leak on cross-origin redirectsmediumCVSS 5.9EPSS 0.4%
- CVE-2026-116684: Model Context Protocol Python SDK token resource confusion in bearer authenticationmediumCVSS 6.8EPSS 0.4%
- CVE-2026-59951: MCP Python SDK unbounded session accumulation in StreamableHTTPhighCVSS 7.5EPSS 0.5%
- 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-2025-66416: Model Context Protocol Python SDK DNS rebinding in HTTP servershighCVSS 8.1EPSS 0.5%
- CVE-2025-53366: Model Context Protocol Python SDK DoS in FastMCP ServerhighCVSS 4EPSS 7.7%
- CVE-2025-53365: Model Context Protocol Python SDK denial of service in HTTP transporthighCVSS 4EPSS 0.4%
Most severe mcp (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- 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-2026-59951: 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-2025-53366: Model Context Protocol Python SDK DoS in FastMCP ServerhighCVSS 4EPSS 7.7%
- CVE-2025-53365: Model Context Protocol Python SDK denial of service in HTTP transporthighCVSS 4EPSS 0.4%
- CVE-2026-59950: modelcontextprotocol python-sdk missing origin validation in WebSocket transporthighCVSS 4EPSS 0.2%
- CVE-2026-116684: Model Context Protocol Python SDK token resource confusion in bearer authenticationmediumCVSS 6.8EPSS 0.4%
- CVE-2026-116686: Model Context Protocol Python SDK unvalidated $ref fetchingmediumCVSS 6.5EPSS 0.3%
- CVE-2026-116685: Model Context Protocol Python SDK credential and body leak on cross-origin redirectsmediumCVSS 5.9EPSS 0.4%
Vulnerabilities per week
4 vulnerabilities in the last four weeks, up from none in the four before. 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 | 0 | 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 | 3 | 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 mcp (PyPI) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/pypi-mcp)<a href="https://junglewise.ai/threats/technologies/pypi-mcp"><img src="https://junglewise.ai/threats/technologies/pypi-mcp/badge.svg" alt="mcp (PyPI) 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/pypi-mcp.json, and this page as text at https://junglewise.ai/threats/technologies/pypi-mcp.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, "mcp (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-mcp, 13 November 2026.