Curl-url-http-3a-2f-2f169.254.169.254-2flatest-2fapi-2ftoken Work May 2026

URL-encoded (percent-encoded) representation

It is important to clarify from the outset that the string you provided— curl-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fapi-2Ftoken —is not a standard keyword. Instead, it is a of a sensitive command and endpoint.

Part 5: How Attackers Abuse Metadata Services

To see it in action, you first grab the token (valid for 6 hours in this example) and then use it: curl-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fapi-2Ftoken

1. If the vulnerable application only supports GET, it cannot retrieve a token from the PUT-only token endpoint.
2. Even if the application supports PUT, the response from the token endpoint contains only the token string, not the sensitive data itself.
3. To retrieve sensitive data, the attacker would need to force the application to make a PUT request to get the token, extract that token, and then make a second GET request to the metadata endpoint injecting the token as a header.

IMDSv2-only

The path http://169.254.169 is the gateway to secure instance management in AWS. If you are building or maintaining cloud infrastructure, ensuring your instances are configured to is a foundational security best practice that prevents credential theft via common web vulnerabilities. If the vulnerable application only supports GET ,

Add a drop rule for 169.254.169.254 in OS firewall or security groups for anyone except the root user. But note: legitimate services might need it. IMDSv2-only The path http://169