---
id: CVE-2022-42472
title: >-
  A improper neutralization of crlf sequences in http headers ('http response
  splitting') vulnerability in Fortinet FortiOS 7.2.0 through 7.2.2, FortiOS
  7.0.0 through 7.0.8, FortiOS 6.4.0 through 6.4.12, FortiOS 6.2 all versions,
  FortiOS 6…
summary: >-
  A improper neutralization of crlf sequences in http headers ('http response
  splitting') vulnerability in Fortinet FortiOS 7.2.0 through 7.2.2, FortiOS
  7.0.0 through 7.0.8, FortiOS 6.4.0 through 6.4.12, FortiOS 6.2 all versions,
  FortiOS 6…
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:U/RC:C'
cvssSource: cna
cwe:
  - CWE-113
vendor: Fortinet
product: FortiProxy
affected:
  - FortiProxy >= 7.2.0 <= 7.2.1
  - FortiProxy >= 7.0.0 <= 7.0.7
  - FortiProxy >= 2.0.0 <= 2.0.10
  - FortiProxy >= 1.2.1 <= 1.2.13
  - FortiProxy 01.02.00
  - FortiProxy >= 1.1.4 <= 1.1.6
  - FortiProxy >= 01.01.00 <= 01.01.03
  - FortiOS >= 7.2.0 <= 7.2.2
  - FortiOS >= 7.0.0 <= 7.0.8
  - FortiOS >= 6.4.0 <= 6.4.12
  - FortiOS >= 6.2.0 <= 6.2.17
  - FortiOS >= 6.0.0 <= 6.0.18
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-10-22T20:18:31.990875Z'
published: '2023-02-16'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T13:48:25.665Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-42472'
references:
  - url: 'https://fortiguard.com/psirt/FG-IR-22-362'
    label: 'https://fortiguard.com/psirt/FG-IR-22-362'
tags:
  - cve.org
epss: 0.00464
epssPercentile: 0.40025
ingestedAt: '2026-10-22T22:00:50.271Z'
---

## Overview

A improper neutralization of crlf sequences in http headers ('http response splitting') vulnerability in Fortinet FortiOS 7.2.0 through 7.2.2, FortiOS 7.0.0 through 7.0.8, FortiOS 6.4.0 through 6.4.12, FortiOS 6.2 all versions, FortiOS 6.0 all versions, FortiProxy 7.2.0 through 7.2.1, FortiProxy 7.0.0 through 7.0.7, FortiProxy 2.0.0 through 2.0.10, FortiProxy 1.2 all versions, FortiProxy 01.02 all versions, FortiProxy 1.1 all versions, FortiProxy 01.01 all versions may allow an authenticated and remote attacker to perform an HTTP request splitting attack which gives attackers control of the remaining headers and body of the response.

## Affected

- `FortiProxy >= 7.2.0 <= 7.2.1`
- `FortiProxy >= 7.0.0 <= 7.0.7`
- `FortiProxy >= 2.0.0 <= 2.0.10`
- `FortiProxy >= 1.2.1 <= 1.2.13`
- `FortiProxy 01.02.00`
- `FortiProxy >= 1.1.4 <= 1.1.6`
- `FortiProxy >= 01.01.00 <= 01.01.03`
- `FortiOS >= 7.2.0 <= 7.2.2`
- `FortiOS >= 7.0.0 <= 7.0.8`
- `FortiOS >= 6.4.0 <= 6.4.12`
- `FortiOS >= 6.2.0 <= 6.2.17`
- `FortiOS >= 6.0.0 <= 6.0.18`

## Remediation

Upgrade to FortiProxy version 7.2.2 or above
Upgrade to FortiProxy version 7.0.8 or above
Upgrade to FortiProxy version 2.0.11 or above
Upgrade to FortiOS version 7.2.3 or above
Upgrade to FortiOS version 7.0.9 or above
Upgrade to FortiOS version 6.4.13 or above