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CVE-2026-4270

nvd nist
Published: Mar 16, 2026Modified: Jun 17, 2026

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6.8
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5 (Secondary)

Description

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.

Affected (1)

Amazon
1 product
Aws Api Mcp Server
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Aws Api Mcp Server
From 0.2.14 to 1.3.9

Related CWEs

CWE-424
Improper Protection of Alternate Path
The product does not sufficiently protect all possible paths that a user can take to access restricted functionality or resources.

References (2)

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Vendor Advisory
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
Third Party Advisory

Timeline

No history available yet.