What is CVE-2026-26204?

CVE-2026-26204 is a medium-severity vulnerability in Wazuh, classified under Buffer Underwrite. CVSS score: 4.4/10. Published 2026-04-29.

How severe is CVE-2026-26204?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Integer overflow in Wazuh

CVE-2026-26204

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1…

EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Wazuh — versions >= 1.0.0, < 4.14.4

Weakness classification (CWE)

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c7-hwjw-8857 (x_refsource_CONFIRM, Exploit, Vendor Advisory)
https://github.com/wazuh/wazuh/releases/tag/v4.14.4 (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-26204?: CVE-2026-26204 is a medium-severity vulnerability in Wazuh, classified under Buffer Underwrite. CVSS score: 4.4/10. Published 2026-04-29.
How severe is CVE-2026-26204?: Medium severity. CVSS v3 base score is 4.4 out of 10.