CVE-2026-121526
Received
Received - Intake
Open Redirect Vulnerability in Fortinet FortiAuthenticator
Vulnerability report for CVE-2026-121526, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-11
Last updated on: 2026-11-11
Assigner: Fortinet, Inc.
Description
Description
A url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiAuthenticator 8.0.0 through 8.0.3, FortiAuthenticator 6.6.0 through 6.6.10 may allow an unauthenticated attacker to perform an open redirect attack via crafted HTTP requests.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Fortinet | FortiAuthenticator | From 8.0.0 (inc) to 8.0.3 (inc) |
| Fortinet | FortiAuthenticator | From 6.6.0 (inc) to 6.6.10 (inc) |
| Fortinet | FortiAuthenticator | From 6.5.0 (inc) to 6.5.7 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-601 | The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. |
