# Anthropic Model Context Protocol Python SDK vulnerabilities Source: https://junglewise.ai/threats/technologies/anthropic-model-context-protocol-python-sdk Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/anthropic-model-context-protocol-python-sdk.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 3 vulnerabilities in Anthropic Model Context Protocol Python SDK: 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-2026-116686, was published on 27 October 2026. 3 vulnerabilities in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 3 - Last 90 days: 3 - All time: 3 (0 critical, 0 exploited in the wild) ## About Anthropic Model Context Protocol Python SDK Model Context Protocol Python SDK is an Anthropic library implementing the MCP protocol. ## Latest Anthropic Model Context Protocol Python SDK vulnerabilities - [CVE-2026-116686: Model Context Protocol Python SDK unvalidated $ref fetching](https://junglewise.ai/threats/cve-2026-116686-the-model-context-protocol-python-sdk-is-the-official-python-sdk) (medium, CVSS 6.5, published 27 Oct 2026) - [CVE-2026-116685: Model Context Protocol Python SDK credential and body leak on cross-origin redirects](https://junglewise.ai/threats/cve-2026-116685-the-model-context-protocol-python-sdk-is-the-official-python-sdk) (medium, CVSS 5.9, published 27 Oct 2026) - [CVE-2026-116684: Model Context Protocol Python SDK token resource confusion in bearer authentication](https://junglewise.ai/threats/cve-2026-116684-the-model-context-protocol-python-sdk-is-the-official-python-sdk) (medium, CVSS 6.8, published 27 Oct 2026) ## Most severe Anthropic Model Context Protocol Python SDK vulnerabilities - [CVE-2026-116684: Model Context Protocol Python SDK token resource confusion in bearer authentication](https://junglewise.ai/threats/cve-2026-116684-the-model-context-protocol-python-sdk-is-the-official-python-sdk) (medium, CVSS 6.8, published 27 Oct 2026) - [CVE-2026-116686: Model Context Protocol Python SDK unvalidated $ref fetching](https://junglewise.ai/threats/cve-2026-116686-the-model-context-protocol-python-sdk-is-the-official-python-sdk) (medium, CVSS 6.5, published 27 Oct 2026) - [CVE-2026-116685: Model Context Protocol Python SDK credential and body leak on cross-origin redirects](https://junglewise.ai/threats/cve-2026-116685-the-model-context-protocol-python-sdk-is-the-official-python-sdk) (medium, CVSS 5.9, published 27 Oct 2026) ## Vulnerabilities per week 3 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 | 0 | 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 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 3 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Anthropic technologies - [Anthropic Claude Code](https://junglewise.ai/threats/technologies/claude-code): 31 vulnerabilities - [Anthropic Model Context Protocol](https://junglewise.ai/threats/technologies/model-context-protocol): 11 vulnerabilities - [Anthropic Claude Desktop](https://junglewise.ai/threats/technologies/claude-desktop): 6 vulnerabilities - [Anthropic Model Context Protocol SDK (TypeScript)](https://junglewise.ai/threats/technologies/model-context-protocol-sdk-typescript): 5 vulnerabilities - [Anthropic @Modelcontextprotocol/Sdk](https://junglewise.ai/threats/technologies/anthropic-modelcontextprotocol-sdk): 4 vulnerabilities - [Anthropic Claude Agent SDK](https://junglewise.ai/threats/technologies/claude-agent-sdk): 4 vulnerabilities - [Anthropic Claude Code CLI](https://junglewise.ai/threats/technologies/claude-code-cli): 3 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, "Anthropic Model Context Protocol Python SDK vulnerabilities", https://junglewise.ai/threats/technologies/anthropic-model-context-protocol-python-sdk, 9 November 2026.