What is CVE-2026-26035?

CVE-2026-26035 is a critical-severity vulnerability in Fortinet Fortiweb, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-08-12.

How severe is CVE-2026-26035?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Fortinet Fortiweb

CVE-2026-26035

An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortiweb — versions 8.0.0, 7.6.0, 7.4.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

psirt@fortinet.com

Frequently asked questions

What is CVE-2026-26035?: CVE-2026-26035 is a critical-severity vulnerability in Fortinet Fortiweb, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-08-12.
How severe is CVE-2026-26035?: Critical severity. CVSS v3 base score is 9.8 out of 10.