SB2026111120 - Open redirect in FortiAuthenticator
Published: November 11, 2026
Security Bulletin ID
SB2026111120
CSH Severity
Medium
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) Open redirect (CVE-ID: CVE-2026-121526)
CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/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 url redirection to untrusted site ('open redirect') on /login. An unauthenticated attacker can perform an open redirect attack via crafted HTTP requests.
Remediation
Install update from vendor's website.