Executive Summary

Amazon AWS Amplify CLI versions prior to 12.10.1 incorrectly modify IAM role trust policies when the Authentication component is removed. The removal deletes the Condition element but leaves "Effect":"Allow", exposing sts:AssumeRoleWithWebIdentity to any caller. An authorized user who removed the component could thus allow unauthorized role assumption, potentially granting attackers access to an organization’s AWS resources. The flaw applies to projects created between Aug 2019 and Jan 2024 and is not yet listed in CISA KEV.

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Authoritative CVE Metadata - CVSS Base Score: 9.8 (CRITICAL) - Published: 2024-04-15T18:15:10.723 - Last Modified: 2026-09-04T14:13:32.820

Original Description: Amazon AWS Amplify CLI before 12.10.1 incorrectly configures the role trust policy of IAM roles associated with Amplify projects. When the Authentication component is removed from an Amplify project, a Condition property is removed but "Effect":"Allow" remains present, and consequently sts:AssumeRoleWithWebIdentity would be available to threat actors with no conditions. Thus, if Amplify CLI had been used to remove the Authentication component from a project built between August 2019 and January 2024, an "assume role" may have occurred, and may have been leveraged to obtain unauthorized access to an organization's AWS resources. NOTE: the problem could only occur if an authorized AWS user removed an Authentication component. (The vulnerability did not give a threat actor the ability to remove an Authentication component.) However, in realistic situations, an authorized AWS user may have removed an Authentication component, e.g., if the objective were to stop using built-in Cognito resources, or move to a completely different identity provider.

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