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2 vulnerabilities found for AWS API MCP Server by AWS

CVE-2026-4270 (GCVE-0-2026-4270)

Vulnerability from nvd – Published: 2026-03-16 16:07 – Updated: 2026-03-16 18:17
VLAI?
Title
AWS API MCP File Access Restriction Bypass
Summary
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.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.8 (Medium)
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
CWE
  • CWE-424 - Improper Protection of Alternate Path
Assigner
References
Impacted products
Vendor Product Version
AWS AWS API MCP Server Affected: 0.2.14 , < 1.3.9 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-4270 (GCVE-0-2026-4270)

Vulnerability from cvelistv5 – Published: 2026-03-16 16:07 – Updated: 2026-03-16 18:17
VLAI?
Title
AWS API MCP File Access Restriction Bypass
Summary
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.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.8 (Medium)
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
CWE
  • CWE-424 - Improper Protection of Alternate Path
Assigner
References
Impacted products
Vendor Product Version
AWS AWS API MCP Server Affected: 0.2.14 , < 1.3.9 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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