CVE-2026-45798

Summary

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44 ↗

Additional information

• NVD record
• https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44Patch
• https://github.com/wazuh/wazuh/pull/36059Patch
• https://github.com/wazuh/wazuh/releases/tag/v4.14.6Patch
• https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2Patch
• https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6rAdvisory