Fetch-url-http-3a-2f-2f169.254.169.254-2flatest-2fmeta Data-2fiam-2fsecurity Credentials-2f [upd] 〈8K × FHD〉

: This specifies the version of the metadata service to use. As of my last update, /latest is the correct version to use.

: The vulnerable application server processes the request internally. Because the request originates from inside the EC2 instance, the server successfully queries 169.254.169.254 .

The strange hyphens and percent‑encoded characters ( %3A for colon, %2F for slash) are URL encoding. When we decode the string, we get:

Let's decode it:

When you successfully fetch http://169.254.169.254/latest/meta-data/iam/security-credentials/<role_name> , the output is JSON:

This string is a URL-encoded command used to target the .

Fix the root cause of the SSRF vulnerability within your application code. : Never trust user-supplied URLs. : This specifies the version of the metadata service to use

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While a critical tool for developers, this endpoint is also a primary target for attacks. What is the 169.254.169.254 Endpoint? Because the request originates from inside the EC2

The string fetch-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta data-2Fiam-2Fsecurity credentials-2F represents a critical security vulnerability payload. Decoded, it targets the Amazon Web Services (AWS) Instance Metadata Service (IMDS). Attackers use this specific payload during Server-Side Request Forgery (SSRF) attacks to steal sensitive Identity and Access Management (IAM) security credentials. Decoding the Payload

When you query http://169.254.169.254/latest/meta-data/iam/security-credentials/ , the service returns a list of IAM role names associated with the EC2 instance.