HTTP response splitting in Fortinet FortiOS
Priority LOW 32CWE-113Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00763 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Fortinet | FortiOS | 7.6.0; 7.4.0 – 7.4.4; 7.2.0 – 7.2.8 | — | No fix listed | CNA |
| Fortinet | FortiProxy | 7.4.0 – 7.4.5; 7.2.0 – 7.2.11 | — | No fix listed | CNA |
- FortiOS VendorFortinet Affected 7.6.0; 7.4.0 – 7.4.4; 7.2.0 – 7.2.8 Fixed in — No fix listed CNA
- FortiProxy VendorFortinet Affected 7.4.0 – 7.4.5; 7.2.0 – 7.2.11 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* | 7.2.0 to before 7.2.12; 7.4.0 to before 7.4.6 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 7.2.0 to before 7.2.9; 7.4.0 to before 7.4.5 | Vulnerable | Fortinet |
| cpe:2.3:o:fortinet:fortios:7.6.0:*:*:*:*:*:*:* | 7.6.0 | Vulnerable | Fortinet |
- cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* Versions 7.2.0 to before 7.2.12; 7.4.0 to before 7.4.6 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* Versions 7.2.0 to before 7.2.9; 7.4.0 to before 7.4.5 Vulnerable ·Fortinet
- cpe:2.3:o:fortinet:fortios:7.6.0:*:*:*:*:*:*:* Versions 7.6.0 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-54021
- 2026-10-03 Alias added: GHSA-v8p8-w9q2-q67j
References
More Fortinet Fortios vulnerabilities
- TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
- TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
- TI-2024-36904 Authentication bypass in Fortinet FortiOS KEVCVSS 3.1CRITICAL 9.8
- TI-2024-15234 A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through… KEVCVSS 3.1CRITICAL 9.8
- TI-2024-14448 Out-of-bounds write in Fortinet FortiOS KEVCVSS 3.1CRITICAL 9.8
- TI-2023-12585 Heap-based buffer overflow in Fortinet FortiOS-6K7K KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2024-54021 · CVE Program
- CVE-2024-54021 · NVD
- FIRST EPSS
- GHSA-v8p8-w9q2-q67j · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences