Acknowledgements

• I have searched (https://github.com/aws/aws-sdk/issues?q=is%3Aissue) for past instances of this issue
• I have verified all of my SDK modules are up-to-date (you can perform a bulk update with go get -u github.com/aws/aws-sdk-go-v2/...)

Describe the bug

A DeserializationError is returned when using a static credentials provider created with a static credentials that has a trailing space or new line in the SecretAccessKey value

DeserializationError: "failed to decode response body, invalid character '\\n' in string literal"

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

An error message relating to the SecretAccessKey being invalid is returned

Current Behavior

A DeserializationError error is returned: "failed to decode response body, invalid character '\\n' in string literal"

Reproduction Steps

1. Create a new credentials provider using credentials.NewStaticCredentialsProvider with the SecretAccessKey value containing a trailing space or new line.
2. Create an aws.config value as normal using the credentials provider created in the above step
3. Create an inspector2.Client with the NewFromConfig method
4. Use the inspector2.Client.ListFindings method

Possible Solution

No response

Additional Information/Context

No response

AWS Go SDK V2 Module Versions Used

github.com/aws/aws-sdk-go-v2 v1.41.1
github.com/aws/aws-sdk-go-v2/service/inspector2 v1.46.2
github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.17 // indirect
github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.17 // indirect
github.com/aws/smithy-go v1.24.0

Compiler and Version used

go version go1.25.5 darwin/arm64

Operating System and version

macOS Tahoe 26.2