{"apiVersion":"1.0","identifier":"CVE-2026-56709","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.","publishedAt":"2026-08-25T02:16:42","lastModifiedAt":"2026-08-26T17:17:08","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56709","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","epssProbability":0.00256,"riskScore":0.77,"affectedProduct":"Grav","affectedVersions":"<3.9.2","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-56709","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-56709","en":"https://www.redsauce.net/en/cves/CVE-2026-56709","fr":"https://www.redsauce.net/fr/cves/CVE-2026-56709","pt":"https://www.redsauce.net/pt/cves/CVE-2026-56709","de":"https://www.redsauce.net/de/cves/CVE-2026-56709","sk":"https://www.redsauce.net/sk/cves/CVE-2026-56709","el":"https://www.redsauce.net/el/cves/CVE-2026-56709"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-56709"}}