CVE-2026-115413

Published: Oct 27, 2026Modified: Oct 28, 2026

7.3

Vector

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

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

Missing token audience validation in the OAuth authentication mode of AWS API MCP Server before version 1.6.0 might allow local users to run AWS operations with the server's configured AWS credentials via an access token issued to another application by the same identity provider. To remediate this issue, users should upgrade to version 1.6.0 and configure the expected token audience or client ID for the server.

Related CWEs

CWE-346

Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

References (3)

https://aws.amazon.com/security/security-bulletins/2026-152-aws/

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

https://github.com/awslabs/mcp/security/advisories/GHSA-4prq-p2x5-w9fh

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

https://pypi.org/project/awslabs.aws-api-mcp-server/1.6.0/

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

Timeline

No history available yet.