CVE-2026-56709

HighCVSS 7.5/10Last modified Oct 12, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-350

Affected software

No affected versions have been published.

Timeline

Published: Aug 25, 2026
Last modified: Oct 12, 2026
NVD status: Deferred

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