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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Fortinet FortiAuthenticator unaffected
Version Status Constraints
8.0.0 affected ≤ 8.0.3
6.6.0 affected ≤ 6.6.10
6.5.0 affected ≤ 6.5.7

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Fortinet Subscribe
Fortiauthenticator Subscribe
Advisories

No advisories yet.

Fixes

Solution

Upgrade to FortiAuthenticator version 8.0.4 or above Upgrade to FortiAuthenticator version 6.6.11 or above

Workaround

No workaround given by the vendor.

References
Link Providers
https://fortiguard.fortinet.com/psirt/FG-IR-26-191 cve-icon
History

Wed, 11 Nov 2026 21:45:00 +0000

Type Values Removed Values Added
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.
First Time appeared Fortinet
Fortinet fortiauthenticator
Weaknesses CWE-601
CPEs cpe:2.3:a:fortinet:fortiauthenticator:6.5.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.5.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.10:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.8:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:6.6.9:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:8.0.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:8.0.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiauthenticator:8.0.3:*:*:*:*:*:*:*
Vendors & Products Fortinet
Fortinet fortiauthenticator
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: fortinet

Published:

Updated: 2026-11-11T21:31:49.831Z

Reserved: 2026-11-03T14:32:06.815Z

Link: CVE-2026-121526

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses