SB2026111142 - Incorrect Implementation of Authentication Algorithm in FortiMail
Published: November 11, 2026
Security Bulletin ID
SB2026111142
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect Implementation of Authentication Algorithm (CVE-ID: CVE-2026-126151)
CWE-ID: CWE-303 - Incorrect Implementation of Authentication Algorithm
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The vulnerability exists due to incorrect implementation of authentication algorithm in fortiweb2. An unauthenticated remote attacker can gain elevation of privilege (account takeover) via a crafted request.
Remediation
Install update from vendor's website.