Detections
Analytics

SCA: security update for mcp (GHSA-h669-8m4g-r2hc)

high Tenable Cloud Security Plugin ID 445498

Description

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

 - MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0,
 MCP::Server::Transports::StreamableHTTPTransport in the mcp gem reads and parses an entire JSON-RPC POST
 body without a size limit, allowing an unauthenticated remote attacker to exhaust process memory. This
 issue is fixed in version 0.23.0. (CVE-2026-67432)

Solution

Update the mcp library and its related packages to version 0.23.0 or later.

See Also

https://github.com/advisories/GHSA-h669-8m4g-r2hc

Plugin Details

Severity: High

ID: 445498

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 7/30/2026

Updated: 7/30/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-67432

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/30/2026

Vulnerability Publication Date: 7/29/2026

Reference Information

CVE: CVE-2026-67432

cwe: CWE-770