Detections
Analytics

SCA: security update for mcp (GHSA-3qhf-m339-9g5v)

high Tenable Cloud Security Plugin ID 428296

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - The MCP Python SDK, called `mcp` on PyPI, is a Python implementation of the Model Context Protocol (MCP).
 Prior to version 1.9.4, 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.
 Version 1.9.4 contains a patch for the issue. (CVE-2025-53366)

Solution

Update the mcp library and its related packages to version 1.9.4 or later.

See Also

https://github.com/advisories/GHSA-3qhf-m339-9g5v

Plugin Details

Severity: High

ID: 428296

Version: Revision 1.10

Type: Local

Family: SCA Checks

Published: 7/5/2025

Updated: 7/16/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.92

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2025-53366

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/4/2025

Vulnerability Publication Date: 7/4/2025

Reference Information

CVE: CVE-2025-53366

cwe: CWE-248