Description
At least one of the following cookies properties causes the cookie to be invalid or incompatible with either a different property of the same cookie, of with the environment the cookie is being used in. Although this is not a vulnerability in itself, it will likely lead to unexpected behavior by the application, which in turn may cause secondary security issues.
Remediation
Ensure that the cookies configuration complies with the applicable standards.
References
Securing cookies with cookie prefixes
Cookies: HTTP State Management Mechanism