AuthFailure
AuthFailure AWS Authentication Failure Error
What This Error Means
The AuthFailure error in Amazon Web Services (AWS) indicates that the provided credentials or authentication mechanisms are not valid or sufficient to access the requested resource or service. This error prevents the user or application from performing the intended operation.
Common Causes
- Invalid AWS Access Key ID or Secret Access Key
- Incorrect IAM role configuration for the AWS resource or the user accessing it
- Missing or expired AWS Security Token Service (STS) token when assuming a role
- IAM policy restrictions preventing access to the specified AWS resource or action
- Clock skew between the client and AWS servers causing signature verification failures
How to Fix It (For Users)
- 1 Verify that the AWS Access Key ID and Secret Access Key are correct. Double-check for typos and leading/trailing spaces.
- 2 If using temporary credentials (STS token), ensure the token is valid and not expired. Refresh the token if necessary.
- 3 Confirm that the IAM user or role has the necessary permissions to access the AWS resource or perform the requested action.
- 4 Check the system clock and synchronize it with a reliable time source (e.g., NTP server) to prevent signature verification failures.
For Site Owners / Developers
- Review and update IAM policies to grant the necessary permissions to the affected users or roles. Use the principle of least privilege.
- Implement proper credential rotation procedures to minimize the risk of compromised keys.
- Monitor AWS CloudTrail logs for authentication failures to identify potential security issues.
- Consider using AWS IAM Identity Center (successor to AWS SSO) for centralized identity management and access control.
When It Is NOT Your Fault
The AuthFailure error can sometimes be caused by temporary issues on the AWS side, such as service outages or internal errors. Check the AWS Service Health Dashboard for any reported incidents in the relevant region.
Is the website actually down?
Sometimes the issue is just on your end. Check if the website is down for everyone or just you.
Check Website Status →Recommended Tool to Prevent This Error
Prevent server timeouts and resource exhaustion with scalable cloud infrastructure.