# CVE-2026-39813: Fortinet FortiSandbox

- Exploited (CISA KEV): no
- Published: 2026-04-14
- CVSS: 9.1 CRITICAL (v3.1)
- EPSS: 22.2% (98th percentile)
- CWE: CWE-24

A path traversal: '../filedir' vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8 may allow attacker to escalation of privilege via specially crafted HTTP requests.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Blocks by default | 2026-07-01 | 78 |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2026-07-07 | 84 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### Cloudflare

- 2026-07-01 · new · rule 32075e19b1494117ac5915e8d84c92c9 · default Block
  > Fortinet FortiSandbox - Path Traversal - CVE:CVE-2026-39813. Previous action: Log. New action: Block. This is a new detection.
  Source: https://developers.cloudflare.com/changelog/post/2026-07-01-waf-release/

### F5

- 2026-07-07 · new · rule 200007109
  > Added: signature 200007109 "Fortinet FortiSandbox Path Traversal" (Path Traversal, risk High), systems: Other Web Server. References: CVE-2026-39813.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2026-39813 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-39813