CVE-2026-56709: Getgrav Grav

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Grav before 3.9.2 fails to validate untrusted Host headers in the sendInvitationEmail() function when constructing token-bearing invitation links. Attackers can manipulate the Host header to poison invitation links and redirect users to attacker-controlled domains, bypassing the require_trusted_host protection which only covers password reset flows.

Affected products

• Getgrav Grav: before 3.9.2 (fixed in 3.9.2)

Published 2026-08-25. Last modified 2026-08-31.