PatchTheCVECVE-2026-26035: An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, For
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CRITICAL 9.8REMOTEUPGRADE
CVE-2026-26035 is a critical-severity flaw (CVSS 9.8) affecting fortiweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password
Why this priority
- Critical severity
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.8% (top 46%) |
| CISA exploited list | No |
| Weakness | CWE-287 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Publisher (CNA): Fortinet, Inc. · Vendor: fortinet
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
fortinet fortiweb UPGRADE
Affected: >= 7.2.0 and < 7.2.13 · >= 7.4.0 and < 7.4.12 · >= 7.6.0 and < 7.6.7 · >= 8.0.0 and < 8.0.3
Fixed in: 7.2.13, 7.4.12, 7.6.7, 8.0.3
Safe to downgrade to: a release before 7.2.0
1. Check installed version
apt-cache policy fortiweb || rpm -q fortiweb || fortiweb --version
2. UPGRADE to 7.2.13 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade fortiweb
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade fortiweb
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 7.2.0 (Debian / Ubuntu)
apt-cache madison fortiweb
sudo apt install fortiweb=<VERSION_BEFORE_7.2.0>
sudo apt-mark hold fortiweb
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fortiweb
sudo dnf downgrade fortiweb-<VERSION_BEFORE_7.2.0>
sudo dnf versionlock add fortiweb
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source
sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-70466 MEDIUM 5.3 UPGRADE A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0