Callback-url-http-3a-2f-2f169.254.169.254-2flatest-2fmeta Data-2fiam-2fsecurity Credentials-2f | LATEST • 2025 |

| Action | Why | |--------|-----| | | It would leak credentials if run on an EC2 instance. | | Block outbound requests to 169.254.169.254 | Prevent SSRF attacks at network level. | | Disable IMDSv1 | Enforce IMDSv2 (requires session token). | | Review any callback/ webhook feature | Ensure it doesn’t allow arbitrary URLs. | | Rotate IAM credentials if exposed | Assume compromise if the callback was triggered. |

: Applications running on the EC2 instance can then use these temporary credentials to make secure requests to AWS services. | Action | Why | |--------|-----| | |

In conclusion, the http://169.254.169.254/latest/meta-data/iam/security-credentials/ URL plays a critical role in secure communication within AWS. By providing temporary security credentials, AWS ensures that instances can access resources securely, without exposing long-term credentials. By following best practices and considerations, developers and administrators can ensure the secure use of this callback URL, ultimately maintaining the integrity and confidentiality of data exchanged between parties. | | Review any callback/ webhook feature |