CVE-2026-4269 - Improper S3 ownership verification in Bedrock AgentCore Starter Toolkit
Amazon S3 ยท 2026-08-20
Actions
Technical Details
| Affected Versions | before v0.1.13 |
|---|---|
| Regions | all |
| CVE IDs | CVE-2026-4269 |
| Migration Required | Yes |
| Cost Impact | Neutral |
| IaC Impact | High |
What This Means
For DevOps Teams
Update the Bedrock AgentCore Starter Toolkit to version v0.1.13 or greater to address the security vulnerability (CVE-2026-4269) and prevent potential code injection during the build process.
For Platform Teams
Integrate the updated Bedrock AgentCore Starter Toolkit (version v0.1.13 or greater) to ensure proper S3 ownership verification and enhance the security posture of the platform.
For Executives
Implement the upgrade to Bedrock AgentCore Starter Toolkit version v0.1.13 to mitigate the risk of code injection and unauthorized code execution due to improper S3 ownership verification.
Source
Related Amazon S3 Updates
- Amazon S3 Metadata and annotations are now available in AWS GovCloud (US) Regions (2026-08-18)
- Amazon S3 adds additional policy details to access denied error messages (2026-08-13)
- Amazon MSK Express brokers now delivers Apache Kafka data to Amazon S3 (2026-07-30)
- Introducing self-managed Amazon S3 buckets for AWS Lambda function code (2026-07-17)
- Amazon S3 removes 30-day minimum for transitions to S3 Standard-IA and S3 One Zone-IA (2026-07-16)