Detections
Analytics

SCA: security update for mcp (GHSA-5p9g-j988-pcwv)

high Tenable Self-Hosted Container Security Plugin ID 445497

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 does not bind a session ID to a session
 owner, allowing an attacker with a stolen session ID to send tools/call requests that execute in the
 victim's session. This issue is fixed in version 0.23.0. (CVE-2026-67431)

Solution

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

See Also

https://github.com/advisories/GHSA-5p9g-j988-pcwv

Plugin Details

Severity: High

ID: 445497

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 7/30/2026

Updated: 7/30/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.63

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-67431

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 4.8

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

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-2026-67431

cwe: CWE-284