Detections
Analytics

SCA: security update for github.com/github/github-mcp-server (GHSA-pjp5-fpmr-3349)

medium Tenable Self-Hosted Container Security Plugin ID 443984

Description

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

 - GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with
 --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with
 the first authenticated user's GraphQL client. All subsequent requests from different users share this
 singleton and their lockdown-related GraphQL queries are executed using the first user's credentials. The
 singleton is never updated to reflect later users' tokens. This vulnerability is fixed in 1.1.2.
 (CVE-2026-48529)

Solution

Update the github.com/github/github-mcp-server library and its related packages to version 1.1.2 or later.

See Also

https://github.com/advisories/GHSA-pjp5-fpmr-3349

Plugin Details

Severity: Medium

ID: 443984

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 6/26/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.1

Percentile: 49.5

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-48529

CVSS v3

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/25/2026

Vulnerability Publication Date: 6/25/2026

Reference Information

CVE: CVE-2026-48529

cwe: CWE-284