{"id":"CVE-2026-56401","summary":"Wazuh - NULL Pointer Dereference in inventory_sync DataValue FlatBuffer Handling","details":"Wazuh wazuh-modulesd before 5.0.0-beta3 contains a null pointer dereference vulnerability in inventory_sync FlatBuffer DataValue handling. An enrolled agent can send a verifier-valid DataValue message omitting the optional id field, causing wazuh-modulesd to crash when dereferencing data-\u003eid()-\u003estring_view() without null validation, resulting in denial of service.","aliases":["GHSA-6hxp-c9x3-qc7p"],"modified":"2026-07-17T03:48:02.026773371Z","published":"2026-07-08T13:49:05.553Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56401.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56401.json"},{"type":"ADVISORY","url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-6hxp-c9x3-qc7p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56401"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/wazuh-null-pointer-dereference-in-inventory-sync-datavalue-flatbuffer-handling"},{"type":"FIX","url":"https://github.com/wazuh/wazuh/commit/3adf4f87942705aa0ceeba1e145c259cc9dcd242"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wazuh/wazuh","events":[{"introduced":"0"},{"fixed":"da844a6fdafd7388d11114841482596d1efdf5b3"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"5.0.0-beta3"}],"source":"AFFECTED_FIELD"}}],"versions":["v5.0.0-beta2","v5.0.0-beta1","issue-34476-fim-tests","v5.0.0-alpha0","v3.13.1","v3.13.0","v3.12.0","v3.8.0","v3.7.0","v3.6.1","v3.6.0","v3.5.0","v3.2.0","v3.1.0","v2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56401.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}