SB2026111193 - Authorization bypass through user-controlled key in FortiMail
Published: November 11, 2026
Security Bulletin ID
SB2026111193
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Authorization bypass through user-controlled key (CVE-ID: CVE-2026-126156)
CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key
CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The vulnerability exists due to authorization bypass through user-controlled key. An unauthenticated remote attacker can take over an arbitrary IBE recipient account via crafted HTTP requests.
Remediation
Install update from vendor's website.