Detections
Analytics

SCA: security update for awslabs.aws-api-mcp-server (GHSA-2cpp-j2fc-qhp7)

medium Tenable Self-Hosted Container Security Plugin ID 438902

Description

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

 - Improper Protection of Alternate Path exists in the no-access and workdir feature of the AWS API MCP
 Server versions >= 0.2.14 and < 1.3.9 on all platforms may allow the bypass of intended file access
 restriction and expose arbitrary local file contents in the MCP client application context. To remediate
 this issue, users should upgrade to version 1.3.9. (CVE-2026-4270)

Solution

Update the awslabs.aws-api-mcp-server library and its related packages to version 1.3.9 or later.

See Also

https://github.com/advisories/GHSA-2cpp-j2fc-qhp7

Plugin Details

Severity: Medium

ID: 438902

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 3/18/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

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:C/I:N/A:N

CVSS Score Source: CVE-2026-4270

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.8

Threat Score: 4.3

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/17/2026

Vulnerability Publication Date: 3/16/2026

Reference Information

CVE: CVE-2026-4270

cwe: CWE-424