---
cve: "CVE-2025-53365"
severity: "HIGH"
cvss: 8.7
epss: "35%"
vendor: "modelcontextprotocol"
kev: false
exploited: false
published: "2025-07-04 22:15:22"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T09:37:42+02:00"
---

# CVE-2025-53365

> 8.7 HIGH · 🧪 PoC

## Beschreibung

The MCP Python SDK, called `mcp` on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to version 1.10.0, if a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing the server to crash and requiring a restart to restore service. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Version 1.10.0 contains a patch for the issue.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 7b420656de48cfdb90b39eb582e60b6d55c2f891 (Commit)

## Referenzen

- <https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-j975-95f5-7wqh>
- <https://github.com/modelcontextprotocol/python-sdk/pull/967>
- <https://github.com/modelcontextprotocol/python-sdk/commit/7b420656de48cfdb90b39eb582e60b6d55c2f891>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-53365) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_