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CVE-2026-26206: Wazuh is a free and open source platform used for threat prevention, detection, and response

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This week
MEDIUM 6.5REMOTEUPGRADE

CVE-2026-26206 is a medium-severity flaw (CVSS 6.5) affecting wazuh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, Wazuh's server API brute-force protection for POST /security/user/authenticate can be bypassed by sending concurrent authentication requests. Although the configured threshold (max_login_attempts, default 50) is enforced correctly for sequential requests, a parallel burst allows significantly more failed login

Why this priority

  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score6.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.2% (top 89%)
CISA exploited listNo
WeaknessCWE-307, CWE-362, CWE-367
Published2026-04-29
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: wazuh

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

wazuh wazuh UPGRADE
Affected: >= 4.0.0 and < 4.14.4
Fixed in: 4.14.4
Safe to downgrade to: a release before 4.0.0
1. Check installed version
apt-cache policy wazuh || rpm -q wazuh || wazuh --version
2. UPGRADE to 4.14.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade wazuh
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade wazuh
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 4.0.0 (Debian / Ubuntu)
apt-cache madison wazuh sudo apt install wazuh=<VERSION_BEFORE_4.0.0> sudo apt-mark hold wazuh
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list wazuh sudo dnf downgrade wazuh-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add wazuh
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-2026-26206?

wazuh: upgrade to 4.14.4. Exact commands for each OS are on this page.

Is CVE-2026-26206 being exploited?

CVE-2026-26206 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-2026-26206 affect?

CVE-2026-26206 affects wazuh. Severity is medium (CVSS 6.5). Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, Wazuh's server API brute-force protection for POST /security/user/authenticate can be bypassed by sen

How urgent is CVE-2026-26206?

Priority 36/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Wazuh vulnerabilities

Related CVEs

References

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