---
id: "CVE-2026-126251"
page: "https://infrastack.ai/live/CVE-2026-126251"
kind: "vulnerability"
aliases: ["CVE-2026-126251"]
title: "Fortinet FortiAuthenticator: incorrect authorization lets attackers bypass login"
severity: "critical"
cvss: 9.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["authentication", "fortiauthenticator", "fortinet", "infrastructure", "self-hosted"]
not_affected_if: ["unaffected-version"]
published_at: "2026-11-11T22:17:25+00:00"
first_seen_at: "2026-11-11T22:29:33+00:00"
updated_at: "2026-11-11T22:31:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126251", "first_seen_at": "2026-11-11T22:29:33+00:00"}]
exploit_sources: []
---

# Fortinet FortiAuthenticator: incorrect authorization lets attackers bypass login

Link for people: https://infrastack.ai/live/CVE-2026-126251 (this .md is for agents)

FortiAuthenticator 8.0.0 through 8.0.3 and 6.6.0 through 6.6.10 contain an incorrect authorization flaw. An attacker may bypass authentication and gain unauthorized access.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed FortiAuthenticator version in the admin interface against the affected ranges: 8.0.0 through 8.0.3 and 6.6.0 through 6.6.10.

## Fix

- Move to a FortiAuthenticator version outside the affected ranges; the sources do not name the fixed version.

## Timeline

- 2026-11-11T22:29:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126251

## From the sources

A incorrect authorization vulnerability in Fortinet FortiAuthenticator 8.0.0 through 8.0.3, FortiAuthenticator 6.6.0 through 6.6.10 may allow an attacker to bypass authentication and gain unauthorized access.

---

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