Detections
Analytics

SCA: security update for mcp (GHSA-7683-3w9x-ch42)

medium Tenable Cloud Security Plugin ID 445500

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::StdioTransport and MCP::Client::Stdio in the mcp gem use IO#gets without a byte
 limit, allowing a peer that sends data without a newline to exhaust process memory. This issue is fixed in
 version 0.23.0. (CVE-2026-63119)

Solution

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

See Also

https://github.com/advisories/GHSA-7683-3w9x-ch42

Plugin Details

Severity: Medium

ID: 445500

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: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2026-63119

CVSS v3

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 5.4

Vector: CVSS:3.0/AV:L/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-2026-63119