CVE-2025-53366
EPSS 0.19%MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS
發布日:2025/7/4修改日:2025/7/5
描述
A validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability (500 errors) until manually restarted. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Thank you to Rich Harang for reporting this issue.
受影響套件(1)
- PyPI/mcpfrom 0, < 1.9.4
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
參考連結(6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-53366
- PATCHhttps://github.com/modelcontextprotocol/python-sdk
- WEBhttps://github.com/modelcontextprotocol/python-sdk/commit/29c69e6a47d0104d0afcea6ac35e7ab02fde809a
- WEBhttps://github.com/modelcontextprotocol/python-sdk/pull/822
- WEBhttps://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.9.4
- WEBhttps://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-3qhf-m339-9g5v