CVE-2022-42472: Fortinet FortiOS

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A improper neutralization of crlf sequences in http headers ('http response splitting') in Fortinet FortiOS versions 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.11, 6.2.0 through 6.2.12, 6.0.0 through 6.0.16, FortiProxy 7.2.0 through 7.2.1, 7.0.0 through 7.0.7, 2.0.0 through 2.0.10, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6 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 products

• Fortinet FortiOS: from 6.0.1, up to and including 6.0.16; from 6.2.0, up to and including 6.2.12; from 6.4.0, up to and including 6.4.11; from 7.0.0, up to and including 7.0.8; version 7.2.0 only; version 7.2.1 only; …
• Fortinet FortiProxy: from 1.1.0, up to and including 1.1.6; from 1.2.0, up to and including 1.2.13; from 2.0.0, up to and including 2.0.10; from 7.0.0, up to and including 7.0.7; version 7.2.0 only; version 7.2.1 only

Published 2023-02-16. Last modified 2026-06-17.