CVE-2026-56709
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| getgrav | grav | 0 < 3.9.2 | affected |
| getgrav | grav | 3.9.2 | unaffected |
Weaknesses
- CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action
References
- https://github.com/getgrav/grav/security/advisories/GHSA-69vf-mjxw-x79j
- https://www.vulncheck.com/advisories/grav-before-host-header-injection-via-sendinvitationemail
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