{"id":"CVE-2026-45798","aliases":[],"url":"https://o3.security/vulnerability/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…","details":"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.","published":"2026-08-19T17:18:49.730","modified":"2026-08-19T17:18:49.730","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44","label":"wazuh/wazuh@b6aac37"},"references":[{"type":"WEB","url":"https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44"},{"type":"WEB","url":"https://github.com/wazuh/wazuh/pull/36059"},{"type":"WEB","url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.6"},{"type":"WEB","url":"https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2"},{"type":"WEB","url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T17:18:49.730"}}