{"id":"CVE-2026-45798","title":"Wazuh is a free and open source platform used for threat prevention, detection, and response","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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-121","CWE-170"],"vendor":"wazuh","product":"wazuh","affected":["wazuh >= 4.5.0, < 4.14.6","wazuh = 5.0.0"],"patched":["wazuh 4.14.6"],"published":"2026-08-19","updated":"2026-09-15","sourceUpdated":"2026-09-15T19:25:59.467","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45798","references":[{"url":"https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/pull/36059","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.6","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00534,"epssPercentile":0.43811,"ingestedAt":"2026-09-09T21:22:45.540Z","slug":"CVE-2026-45798","body":"## Overview\n\nWazuh 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.\n\n## Affected\n\n- `wazuh >= 4.5.0, < 4.14.6`\n- `wazuh = 5.0.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `wazuh 4.14.6`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}