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Vulnerabilities

Vulnerability · CVE-2022-42472

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.…

Published Feb 16, 2023 · catalog updated Oct 22, 2026 · the affected product

Check if you run it

No confirmed exploitation is on record for CVE-2022-42472. EPSS is 0.46%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.46%
Remediation
Version ranges on file
Affected products
cpe fortinet/fortios · cpe fortinet/fortiproxy

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe fortinet/fortios>= 6.0.1, <= 6.0.16
  • cpe fortinet/fortios>= 6.2.0, <= 6.2.12
  • cpe fortinet/fortiproxy7.2.0
  • cpe fortinet/fortiproxy7.2.1
  • cpe fortinet/fortiproxy>= 1.1.0, <= 1.1.6
  • cpe fortinet/fortiproxy>= 1.2.0, <= 1.2.13
  • cpe fortinet/fortiproxy>= 2.0.0, <= 2.0.10
  • cpe fortinet/fortiproxy>= 7.0.0, <= 7.0.7

How to fix CVE-2022-42472

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2022-42472. EPSS is 0.46%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with >= 6.0.1, <= 6.0.16, >= 6.2.0, <= 6.2.12, 7.2.0, 7.2.1, >= 1.1.0, <= 1.1.6, >= 1.2.0, <= 1.2.13. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-113; CWE-74: Injection. EPSS 0.46%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Fortinet security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 16, 2023 · NIST NVD

    Detected

    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

  2. Oct 22, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2022-42472

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-42472

    30-day exploitation probability 0.46%

    first.org
  • NIST NVDVulnerability recordCVE-2022-42472

    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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.