Fetch-url-http-3a-2f-2f169.254.169.254-2flatest-2fmeta | Data-2fiam-2fsecurity Credentials-2f Work

When a request is made to http://169.254.169.254/latest/meta-data/iam/security-credentials/ , the response includes a JSON object containing temporary security credentials. These credentials include:

It can only be accessed from within the running EC2 instance. 2. The IAM Security Credentials Endpoint Explained

Note: This article explains the technical behavior of querying the well-known cloud instance metadata service IP (169.254.169.254) and the specific path /latest/meta-data/iam/security-credentials/. It is intended for engineers, cloud operators, and security practitioners. Do not use this information to attempt unauthorized access to systems you do not control. When a request is made to http://169

To mitigate the risk of SSRF, AWS introduced .

: This part of the URL refers to the metadata service endpoint. The metadata service provides information about the instance, such as its ID, type, and IP address. The IAM Security Credentials Endpoint Explained Note: This

If your application must fetch external data, restrict the backend to a strict allowlist of approved domains. 3. Practice the Principle of Least Privilege

Specifically, it attempts to retrieve (temporary access keys) associated with a specific IAM role assigned to an EC2 instance. What it means To mitigate the risk of SSRF, AWS introduced

fetch-url-http://169.254.169.254/latest/meta-data/iam/security-credentials/

The endpoint in our keyword corresponds to IMDSv1. It returns the temporary credentials of the IAM role attached to the instance. If an instance has no IAM role, this endpoint returns a 404 error.

Understanding and Securing the AWS Metadata Service: http://169.254.169.254/latest/meta-data/iam/security-credentials/

If you are seeing this string in an error message like "Unable to get IAM security credentials...", it usually means: