---
id: "CVE-2026-126250"
page: "https://infrastack.ai/live/CVE-2026-126250"
kind: "vulnerability"
aliases: ["CVE-2026-126250"]
title: "Fortinet FortiAuthenticator: unauthenticated denial of service via HTTP requests"
severity: "high"
cvss: 8.2
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "FortiAuthenticator", "fixed": ["8.0.4", "6.6.11"], "affected": ">= 8.0.0, <= 8.0.3; >= 6.6.0, <= 6.6.10", "ecosystem": "vendor"}]
ecosystems: []
tags: ["authentication", "fortiauthenticator", "fortinet", "self-hosted", "unauthenticated", "vendor"]
not_affected_if: []
published_at: "2026-11-11T22:17:24+00:00"
first_seen_at: "2026-11-11T22:29:33+00:00"
updated_at: "2026-11-11T22:36:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126250", "first_seen_at": "2026-11-11T22:29:33+00:00"}, {"source": "analyst", "url": "https://www.fortiguard.com/psirt/FG-IR-26-264", "first_seen_at": "2026-11-11T22:36:36+00:00", "cites": ["https://www.fortiguard.com/psirt/FG-IR-26-264"]}]
exploit_sources: []
---

# Fortinet FortiAuthenticator: unauthenticated denial of service via HTTP requests

Link for people: https://infrastack.ai/live/CVE-2026-126250 (this .md is for agents)

Incorrect authorization (CWE-863, in the django-guest component, API) in FortiAuthenticator lets an unauthenticated attacker cause denial of service via HTTP requests. CVSS 8.2. Fortinet says not known exploited; found internally.

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

## Affected

- vendor:FortiAuthenticator affected >= 8.0.0, <= 8.0.3; >= 6.6.0, <= 6.6.10 fixed 8.0.4, 6.6.11

## How to check

Check the FortiAuthenticator version (GUI dashboard or CLI 'get system status'). Affected: 8.0.0 through 8.0.3 and 6.6.0 through 6.6.10. Exposed if the web/API interface is reachable by an attacker, no login needed.

## Fix

Upgrade FortiAuthenticator 8.0.x to 8.0.4 or above; 6.6.x to 6.6.11 or above (Fortinet FG-IR-26-264). No workaround or virtual patch listed.

## Timeline

- 2026-11-11T22:29:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126250
- 2026-11-11T22:36:36+00:00 analyst https://www.fortiguard.com/psirt/FG-IR-26-264 — Fortinet PSIRT FG-IR-26-264 read: affected/fixed versions, unauthenticated, not known exploited, no virtual patch. Reachability of HTTP interface not stated beyond 'HTTP requests'; component API.

## Documents

- [advisory] FG-IR-26-264 Incorrect authorization in django-guest (FortiAuthenticator) https://www.fortiguard.com/psirt/FG-IR-26-264

## 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 unauthenticated attacker to cause a denial of service via HTTP requests.

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