Improper link resolution in asset bundling output handling in aws-cdk-lib

Bulletin ID: 2026-131-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 10/08/2026 12:30 PM PDT Description: AWS CDK is an open source framework that allows customers to build cloud infrastructure using their favorite programming language (Python, Typescript, C#, Go). That infrastructure is then able to be deployed with AWS CDK command line commands to AWS CloudFormation. We identified CVE-2026-107608, which is an issue where Docker files could be configured to insert symlinked files into the output of the AWS CDK asset bundling process when it was invoked with a Docker file. When bundling an asset using AWS CDK with a docker file, prior to 2.267.0, it was possible for a docker file to insert a symlinked file or directory into the output of asset bundling without the symlink having been provided as input to the bundling process. Impacted versions: All aws-cdk-lib versions before 2.267.0 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.