# CVE-2026-107608: AWS CDK improper link resolution in asset bundling output

Source: https://junglewise.ai/threats/cve-2026-107608-improper-link-resolution-in-asset-bundling-output-handling-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-08. Updated: 2026-10-08  
License: CC BY 4.0 with a link back

CVE-2026-107608 · Severity: high · CVSS 5.5 · Published 2026-10-08

AWS CDK is a framework for defining cloud infrastructure as code in Python, TypeScript, C#, or Go. A flaw in the asset bundling process allows Docker containers used during builds to insert arbitrary symlinked files or directories into the deployment package without those files being explicitly provided, potentially exposing sensitive data or injecting malicious code into cloud deployments.

Technologies: [Amazon AWS](https://junglewise.ai/threats/technologies/aws). Vendors: [Amazon](https://junglewise.ai/threats/vendors/amazon), [AWS](https://junglewise.ai/threats/vendors/aws).

## Quick answers

**Is CVE-2026-107608 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-107608 being exploited in the wild.

**How severe is CVE-2026-107608?** High severity, with a CVSS score of 5.5, published 8 October 2026.

**Which products and versions are affected?** Aws-Cdk-Lib before 2.267.0.

**Is there a fix for CVE-2026-107608?** Yes: fixed in 2.267.0. Until then: Audit all Docker bundling containers and their dependencies to confirm that no untrusted code executes inside the configured bundling environment. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-107608 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-107608?** Check whether you run Amazon AWS or Aws-Cdk-Lib at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.267.0

Audit all Docker bundling containers and their dependencies to confirm that no untrusted code executes inside the configured bundling environment.

## Technical details

The vulnerability is an improper link resolution issue in aws-cdk-lib's Docker-based asset bundling process. When a Docker file is used for asset bundling prior to version 2.267.0, an attacker can configure the Docker container to insert symlinked files into the output that were not part of the bundling input, allowing arbitrary file inclusion from the build environment. This requires the attacker to control or influence the Docker file or container configuration used in the bundling workflow.

## Affected products

- AWS aws-cdk-lib before 2.267.0

## Timeline

- 2026-10-08: disclosed

## References

- [https://aws.amazon.com/security/security-bulletins/rss/2026-131-aws/](https://aws.amazon.com/security/security-bulletins/rss/2026-131-aws/)

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