Security researchers identified a major flaw in the AWS Console that could have allowed attackers to seize control of key GitHub repositories, potentially leading to widespread supply chain attacks. The vulnerability, linked to a misconfiguration in AWS CodeBuild CI pipelines, has been addressed by AWS following its disclosure in August 2025. Users are advised to implement certain security measures to mitigate risks.

Attackers can exploit AWS CodeBuild to gain long-term access to compromised accounts by configuring it as a GitHub Actions runner and backdooring an IAM role. This process allows them to persistently execute commands in the AWS environment, even after the original credentials are revoked. Defenders must monitor CloudTrail logs and audit IAM trust relationships to detect such abuses.