Fortinet FortiWeb: Mehrere Schwachstellen
WID-SEC-2026-1091 · first 15.04.2026 · updated 16.04.2026 · CVSS 6,7
What it is about
FortiWeb ist eine Web Application Firewall von Fortinet. Ein Angreifer kann mehrere Schwachstellen in Fortinet FortiWeb ausnutzen, um einen Denial of Service Angriff durchzuführen oder Code auszuführen.
Under what conditions?
The BSI does not name any particular preconditions.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen oder Code auszuführen
Am I affected?
Affected according to the BSI:
- Fortinet FortiWeb <8.0.3
- Fortinet FortiWeb <7.6.7
- Fortinet FortiWeb <8.0.4
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Fortinet FortiWeb 8.0.3
- Fortinet FortiWeb 7.6.7
- Fortinet FortiWeb 8.0.4
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- FortiGuard Labs PSIRT Advisory FG-IR-26-108 vom 2026-04-14 www.fortiguard.com
- FortiGuard Labs PSIRT Advisory FG-IR-26-114 vom 2026-04-14 www.fortiguard.com
CVE: CVE-2026-39811, CVE-2026-39814
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.