{"affected":[{"defaultStatus":"unaffected","product":"FortiMail","source":"CNA: fortinet","vendor":"Fortinet","versions":[{"lessThanOrEqual":"8.0.1","status":"affected","version":"8.0.0","versionType":"semver"},{"lessThanOrEqual":"7.6.6","status":"affected","version":"7.6.0","versionType":"semver"},{"lessThanOrEqual":"7.4.8","status":"affected","version":"7.4.0","versionType":"semver"},{"lessThanOrEqual":"7.2.9","status":"affected","version":"7.2.0","versionType":"semver"}]}],"cveId":"CVE-2026-126156","cwes":["CWE-639"],"description":"A authorization bypass through user-controlled key vulnerability in Fortinet FortiMail 8.0.0 through 8.0.1, FortiMail 7.6.0 through 7.6.6, FortiMail 7.4.0 through 7.4.8, FortiMail 7.2 all versions may allow an unauthenticated remote attacker to take over an arbitrary IBE recipient account via crafted HTTP requests.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":9.1,"severity":"critical","source":"CNA: fortinet","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C","version":"3.1"}],"modifiedAt":1794432554950,"publishedAt":1794432554950,"references":[{"source":"CNA: fortinet","tags":[],"url":"https://fortiguard.fortinet.com/psirt/FG-IR-26-208"}],"remediation":[{"kind":"fix","source":"CNA: fortinet","text":"Upgrade to FortiMail version 8.0.2 or above\nUpgrade to FortiMail version 7.6.7 or above\nUpgrade to FortiMail version 7.4.9 or above"}],"revision":"1f5a658d4a803f180c9a56975b3fbff8305130d76d7a8ce2fa78553fbc8fab8a","sources":[{"modifiedAt":1794432554950,"name":"CNA: fortinet","retrievedAt":1794434948166,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126156"}],"ssvc":null,"status":"published","title":"CVE-2026-126156","updatedAt":1794434948166}