Vendor
Modelcontextprotocol vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 13 vulnerabilities in Modelcontextprotocol: 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-2026-109527, was published on 14 October 2026. 1 vulnerability in the last four weeks, down 67% on the four before (3).
- Last 7 days
- 0
- Last 90 days
- 4
- Critical, all time
- 0
- Exploited in the wild
- 0
About Modelcontextprotocol
Organization that develops the Model Context Protocol for standardized AI tool integration.
Latest Modelcontextprotocol vulnerabilities
- CVE-2026-109527: Model Context Protocol Python SDK request body buffer overflowhighCVSS 7.5EPSS 0.7%
- rmcp OAuth client SSRF via server-controlled resource_metadata URLmediumCVSS 4
- CVE-2026-104120: Model Context Protocol mcp-server-fetch SSRF in fetch_urlhighCVSS 7.3EPSS 0.3%
- CVE-2026-63128: RMCP Streamable HTTP server unauthenticated session-table memory leakhighCVSS 7.5EPSS 0.6%
- CVE-2026-63119: modelcontextprotocol ruby-sdk memory exhaustion in Stdio transportsmediumCVSS 6.2EPSS 0.2%
- CVE-2026-63118: modelcontextprotocol ruby-sdk DNS rebinding in StreamableHTTPTransportmediumCVSS 4EPSS 0.3%
- CVE-2026-44428: Model Context Protocol Registry OIDC token replay via shared audiencemediumCVSS 4.7EPSS 0.3%
- CVE-2026-44427: Model Context Protocol Registry open redirect in TrailingSlashMiddlewaremediumCVSS 4EPSS 0.4%
- CVE-2026-45781: Model Context Protocol Registry ownership bypass in OCI validatorlowCVSS 3.5EPSS 0.3%
- CVE-2026-44430: Model Context Protocol Registry SSRF via IPv6 Filter BypassmediumCVSS 4EPSS 0.3%
- CVE-2026-44429: MCP Registry stored XSS in catalogue UI via websiteUrlmediumCVSS 5.4EPSS 0.2%
- CVE-2026-42559: Model Context Protocol RMCP DNS rebinding in Streamable HTTP serverhighCVSS 8.8EPSS 0.2%
- CVE-2026-27896: Model Context Protocol Go SDK improper case sensitivity in JSON-RPC parsinghighCVSS 7.5EPSS 0.5%
Most severe Modelcontextprotocol 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-2026-109527: Model Context Protocol Python SDK request body buffer overflowhighCVSS 7.5EPSS 0.7%
- CVE-2026-63128: RMCP Streamable HTTP server unauthenticated session-table memory leakhighCVSS 7.5EPSS 0.6%
- CVE-2026-27896: Model Context Protocol Go SDK improper case sensitivity in JSON-RPC parsinghighCVSS 7.5EPSS 0.5%
- CVE-2026-104120: Model Context Protocol mcp-server-fetch SSRF in fetch_urlhighCVSS 7.3EPSS 0.3%
- CVE-2026-63119: modelcontextprotocol ruby-sdk memory exhaustion in Stdio transportsmediumCVSS 6.2EPSS 0.2%
- CVE-2026-44429: MCP Registry stored XSS in catalogue UI via websiteUrlmediumCVSS 5.4EPSS 0.2%
- CVE-2026-44428: Model Context Protocol Registry OIDC token replay via shared audiencemediumCVSS 4.7EPSS 0.3%
- CVE-2026-44427: Model Context Protocol Registry open redirect in TrailingSlashMiddlewaremediumCVSS 4EPSS 0.4%
- CVE-2026-44430: Model Context Protocol Registry SSRF via IPv6 Filter BypassmediumCVSS 4EPSS 0.3%
Vulnerabilities per week
1 vulnerability in the last four weeks, down 67% on the four before (3). 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 | 1 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 2 | 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 Modelcontextprotocol vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/vendors/modelcontextprotocol)<a href="https://junglewise.ai/threats/vendors/modelcontextprotocol"><img src="https://junglewise.ai/threats/vendors/modelcontextprotocol/badge.svg" alt="Modelcontextprotocol 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/vendors/modelcontextprotocol.json, and this page as text at https://junglewise.ai/threats/vendors/modelcontextprotocol.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, "Modelcontextprotocol vulnerabilities", https://junglewise.ai/threats/vendors/modelcontextprotocol, 9 November 2026.