{"id":"CVE-2026-44254","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 1.0.0 until 4.14.6 and 5.0.0-beta2, HandleSecureMessage() in src/remoted/secure.c passes a pointer inside its stack buffer to ReadSecMSG()…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-131","CWE-787"],"vendor":"wazuh","product":"wazuh","affected":["wazuh >= 1.0.0, < 4.14.6","wazuh = 5.0.0"],"patched":["wazuh 4.14.6"],"published":"2026-08-19","updated":"2026-09-18","sourceUpdated":"2026-09-18T14:54:45.570","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44254","references":[{"url":"https://github.com/wazuh/wazuh/commit/96772487fbdecd43cc83e284ee7aeb45e3cfcd96","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/pull/35773","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-9wm4-fp6c-hqgq","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.0038,"epssPercentile":0.31946,"ingestedAt":"2026-09-09T21:22:45.539Z","slug":"CVE-2026-44254","body":"## Overview\n\nWazuh is a free and open source platform used for threat prevention, detection, and response. From 1.0.0 until 4.14.6 and 5.0.0-beta2, HandleSecureMessage() in src/remoted/secure.c passes a pointer inside its stack buffer to ReadSecMSG(), and src/os_crypto/shared/msgs.c decompresses up to OS_MAXSTR bytes at that offset. For an encrypted agent message on TCP port 1514 that expands to 65,536 bytes, os_zlib_uncompress() writes a terminating null byte beyond the end of the destination buffer. The resulting stack out-of-bounds write in the root-level remoted daemon can crash message processing and disrupt agent communications. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.\n\n## Affected\n\n- `wazuh >= 1.0.0, < 4.14.6`\n- `wazuh = 5.0.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `wazuh 4.14.6`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}