Authorization bypass through user-controlled key in FortiMail - CVE-2026-126152
Published: November 11, 2026
Vulnerability identifier: #VU165263
CSH Severity: Low
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-126152
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated user to damange or delete data.
The vulnerability exists due to authorization bypass through user-controlled key. An authenticated remote attacker can delete arbitrary directories as root, or to access or delete other users' calendar and mailbox data across tenant domains, via crafted HTTP requests to the webmail and administrative interfaces.
Affected software
FortiMail
How to mitigate CVE-2026-126152
Install update from vendor's website.
FortiMail - addressed in versions 7.4.9, 7.6.7, 8.0.2