Fetch-url-http-3a-2f-2fmetadata.google.internal-2fcomputemetadata-2fv1-2finstance-2fservice Accounts-2f Patched Jun 2026

– Do not expose the metadata endpoint to the public internet or other VMs. It is for instance-local use only.

– Enable Cloud Audit Logs for service account token generation. – Do not expose the metadata endpoint to

You must include Metadata-Flavor: Google in all requests to prevent common SSRF bypasses. Common Sub-Paths: You must include Metadata-Flavor: Google in all requests

However, the string you provided ( fetch-url-http-3A-2F-2Fmetadata... ) appears to be URL-encoded. Here’s what’s happening: Here’s what’s happening: Fetching this URL returns a

Fetching this URL returns a list of service account identities authorized for the instance. By default, this usually includes the "default" compute service account. Sub-paths of this endpoint allow developers to retrieve:

The URL http://metadata.google.internal/computeMetadata/v1/instance/service-accounts might seem mysterious at first, but it's a valuable resource for GCP developers. By understanding what this URL returns and how to use it, you can simplify your application's authentication and authorization flows, making it more secure and scalable.

– You don’t need to rotate keys. The hypervisor refreshes credentials behind the scenes. Your app gets a new token every hour.