SB2026111143 - Incorrect authorization in FortiMail
Published: November 11, 2026
Security Bulletin ID
SB2026111143
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) Incorrect authorization (CVE-ID: CVE-2026-126155)
CWE-ID: CWE-863 - Incorrect Authorization
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 incorrect authorization. An unauthenticated remote attacker can obtain an authenticated IBE webmail session as any IBE recipient and read or send their encrypted mail via crafted HTTP requests.
Remediation
Install update from vendor's website.