CVE-2026-4270

MEDIUM

5.5

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.

Details CVE

Score CVSS v3.15.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Vecteur d'attaqueLOCAL

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie3/16/2026

Derniere modification3/17/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-424

References

https://aws.amazon.com/security/security-bulletins/2026-007-AWS/(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.9/(ff89ba41-3aa1-4d27-914a-91399e9639e5)

Correlations IOC

Aucune correlation enregistree

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