FortiWeb vulnerabilities: known CVEs & security history
Fortinet · Actively exploited · 5 tracked CVEs · 0 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all FortiWeb release lines — 5 in total. A CVE here doesn't mean your version is affected — check FortiWeb's current status and the safe version to run.
Known FortiWeb CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-26035 | critical | 9.8 | 1% | 2026 |
| CVE-2024-48884 | high | 7.5 | 15% | 2025 |
| CVE-2026-40688 | high | 7.2 | 6% | 2026 |
| CVE-2026-70466 | medium | 5.3 | 0% | 2026 |
| CVE-2024-48885 | medium | 5.3 | 1% | 2025 |
Is my FortiWeb version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your FortiWeb version → · Monitor FortiWeb for new CVEs →
FortiWeb vulnerabilities — frequently asked
How many known vulnerabilities does FortiWeb have?
IsItPatched tracks 5 CVEs for FortiWeb. 1 is critical-severity and 2 high-severity. These span every release line — what matters is whether the version you run is affected.
Does FortiWeb have any actively-exploited vulnerabilities?
None of FortiWeb's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe FortiWeb vulnerability?
Among tracked issues, CVE-2026-26035 (CRITICAL, CVSS 9.8) ranks highest — a Improper authentication weakness.
Is FortiWeb safe to use?
It depends on the version. The latest supported FortiWeb release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: FortiWeb security status · FortiWeb end-of-life · actively-exploited CVEs. Always verify against Fortinet's advisories — see our disclaimer.