CVE-2026-70466: A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-70466 is a medium-severity flaw (CVSS 5.3) affecting fortiweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to improper access control via <insert attack vector here>

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-184
Published	2026-08-12
Last modified	2026-10-23

Publisher (CNA): Fortinet, Inc. · Vendor: fortinet

Am I affected?

Timeline

2026-08-12 13:17 UTCPublished CVE record published
2026-10-23 20:10 UTCUpdated Record last modified

fortinet fortiweb UPGRADE

Affected: >= 7.0.0 and < 7.6.6 · >= 8.0.0 and < 8.0.3

Fixed in: 7.6.6, 8.0.3

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy fortiweb || rpm -q fortiweb || fortiweb --version

2. UPGRADE to 7.6.6 (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 7.0.0 (Debian / Ubuntu)

apt-cache madison fortiweb sudo apt install fortiweb=<VERSION_BEFORE_7.0.0> 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_7.0.0> 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.

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.

Quick answers

How do I fix CVE-2026-70466?

fortiweb: upgrade to 7.6.6, 8.0.3. Exact commands for each OS are on this page.

Is CVE-2026-70466 being exploited?

CVE-2026-70466 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70466 affect?

CVE-2026-70466 affects fortiweb. Severity is medium (CVSS 5.3). A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to improper acce

How urgent is CVE-2026-70466?

Priority 29/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-26035 CRITICAL 9.8 UPGRADE An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, For

References

← Back to latest CVEs