Detections
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SCA: security update for mcp (GHSA-rwrf-2pqf-9j8j)

medium Tenable Self-Hosted Container Security Plugin ID 477695

Description

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

 - The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and
 clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls
 validate server-declared outputSchema documents with jsonschema's default resolver, causing an unresolved
 $ref value to fetch an HTTP, HTTPS, or file URL from the client's network and filesystem context. A server
 can trigger blind requests or local-file reads and can stall every session in the process because
 resolution runs synchronously on the event loop without a timeout. This issue is fixed in versions 1.30.0
 and 2.2.0. (CVE-2026-116686)

Solution

Update the mcp library and its related packages to version 1.30.0 or later.

See Also

https://github.com/advisories/GHSA-rwrf-2pqf-9j8j

Plugin Details

Severity: Medium

ID: 477695

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/28/2026

Updated: 10/28/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: Medium

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-2026-116686

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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: 10/27/2026

Vulnerability Publication Date: 10/27/2026

Reference Information

CVE: CVE-2026-116686

cwe: CWE-918