How severe is CVE-2026-26206?

CVE-2026-26206 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-26206 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26206?

CVE-2026-26206 affects Wazuh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26206?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26206 have an EU (EUVD) identifier?

Yes. CVE-2026-26206 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26268.

When was CVE-2026-26206 published?

CVE-2026-26206 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-26206

CVE-2026-26206 is a medium-severity vulnerability in Wazuh with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-307.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26268
Weakness: CWE-307
Affected product: Wazuh
Published: 2026-04-29
Last modified: 2026-06-17

Description

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 attempts to be processed before the IP block is applied. This enables an attacker to perform more password guesses than the configured policy intends (e.g., 100 attempts processed where 50 should be allowed). This issue has been patched in version 4.14.4.

Frequently asked questions

What is CVE-2026-26206?: 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 attempts to be processed before the IP block is applied. This enables an attacker to perform more password guesses than the configured policy intends (e.g., 100 attempts processed where 50 should be allowed). This issue has been patched in version 4.14.4.
How severe is CVE-2026-26206?: CVE-2026-26206 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-26206 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26206?: CVE-2026-26206 affects Wazuh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26206?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26206 have an EU (EUVD) identifier?: Yes. CVE-2026-26206 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26268.
When was CVE-2026-26206 published?: CVE-2026-26206 was published on 2026-04-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*

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