FortiOS
CVE-2024-54021: HTTP response splitting in FortiOS, FortiProxy
An Improper Neutralization of CRLF Sequences in HTTP Headers ('http response splitting') vulnerability [CWE-113] in Fortinet FortiOS 7.2.0 through 7.6.0, FortiProxy 7.2.0 through 7.4.5 may allow a remote unauthenticated attacker to bypass the file filter via crafted HTTP headers.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| FortiOS 7.6 | 7.6.1 or later |
| FortiOS 7.4.0 to 7.4.4 | 7.4.5 or later |
| FortiOS 7.2.0 to 7.2.8 | 7.2.9 or later |
| FortiProxy 7.4.0 to 7.4.5 | 7.4.6 or later |
| FortiProxy 7.2.0 to 7.2.11 | 7.2.12 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Improper Neutralization of CRLF Sequences in HTTP Headers ('http response splitting') vulnerability [CWE-113] in Fortinet FortiOS 7.2.0 through 7.6.0, FortiProxy 7.2.0 through 7.4.5 may allow a remote unauthenticated attacker to bypass the file filter via crafted HTTP headers.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.