CVE-2026-45075 is a high-severity authorization bypass vulnerability in Symfony, a widely-used PHP web application framework. When method-scoped security attributes (#[IsGranted], #[IsSignatureValid], #[IsCsrfTokenValid]) are configured to restrict checks to GET requests, an unauthenticated attacker can send an HTTP HEAD request to silently bypass the security check and reach the protected controller. The vulnerability is rated 8.3 (CVSS 4.0 / HIGH) and is classified under CWE-863: Incorrect Authorization.
