Flask: Session Signing Vulnerability

In Flask version 3.1.0 a medium severity vulnerability CVE-2025-47278 was detected. This vulnerability allows attackers to potentially take advantage of old session keys still being used, which weakens protection for user sessions in some setups. To fix this issue, users should upgrade Flask to version 3.1.1. For more details, visit https://nvd.nist.gov/vuln/detail/CVE-2025-47278.