🛡️ CVE-2025-53365
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-248 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector 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
CWE CWE-248
Public Exploit ✅ No
Source NVD
Published 2025-07-04
Updated 2026-06-02
Modified 2025-07-05
Fix URL N/A

Affected Packages

Software From version Fixed in
mcp 1.10.0
unknown

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