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http://169.254.169.254/latest/meta-data/iam/security-credentials/
Understanding SSRF and the AWS Metadata Vulnerability The string request-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta data-2Fiam-2Fsecurity credentials-2F represents a URL-encoded payload frequently used by security researchers, attackers, and automated scanners. Decoded, it targets a well-known administrative endpoint:
As cloud architects and developers, we must: http://169
* 169.254. 169.254 is an IP address used by cloud service providers, such as AWS, Azure, and Google Cloud, to provide metadata abo... Security Compass
: Implement strict allow-lists for any user-provided URLs. Do not allow requests to internal IP ranges (like 169.254.x.x , 10.x.x.x , or 192.168.x.x ). Security Compass : Implement strict allow-lists for any
The URL http://169.254.169 is a critical AWS instance metadata endpoint, frequently targeted in Server-Side Request Forgery (SSRF) attacks to steal temporary IAM credentials. Security experts recommend enforcing Instance Metadata Service Version 2 (IMDSv2) to mitigate these risks by requiring session-oriented tokens. Read the full analysis at Hacking Articles .
| Feature | IMDSv1 | IMDSv2 | | :--- | :--- | :--- | | | None. Simple GET requests. | Session-based tokens required. | | SSRF Protection | Highly vulnerable. | Resilient against basic SSRF. | | Request Method | GET | PUT for token, GET for data. | | Defense in Depth | Low. | High (adds multiple barriers). | | AWS Recommendation | Legacy, not recommended. | Best practice and standard. | and automated scanners. Decoded
The 2019 Capital One data breach, which exposed over 100 million customer records, was enabled by an SSRF vulnerability that led to the http://169.254.169.254/latest/meta-data/iam/security-credentials/ endpoint.