CVE-2026-39811: A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6…
CVE-2026-39811 · Severity: medium · CVSS 4.9 · Published 2026-04-14
A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to denial of service via <insert attack vector here>
No. Junglewise Threat Intelligence has no report of CVE-2026-39811 being exploited in the wild.
How severe is CVE-2026-39811?
Medium severity, with a CVSS score of 4.9, published 14 April 2026.
Which products and versions are affected?
Fortinet FortiWeb. The advisory does not name versions.
Is there a fix for CVE-2026-39811?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-39811?
Check whether you run Fortinet FortiWeb. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.