CVE-2026-56401 | THREATINT

Description

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->id()->string_view() without null validation, resulting in denial of service.

PUBLISHED Reserved 2026-06-21 | Published 2026-07-08 | Updated 2026-07-08 | Assigner VulnCheck

HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

NULL Pointer Dereference

Product status

Default status

unaffected

Any version before 5.0.0-beta3

affected

5.0.0-beta3 (semver)

unaffected

Credits

kocaemre finder

vikman90 analyst

References

github.com/.../wazuh/security/advisories/GHSA-6hxp-c9x3-qc7p exploit

github.com/.../wazuh/security/advisories/GHSA-6hxp-c9x3-qc7p (GitHub Security Advisory (GHSA-6hxp-c9x3-qc7p)) vendor-advisory

github.com/...ommit/3adf4f87942705aa0ceeba1e145c259cc9dcd242 patch

www.vulncheck.com/...tory-sync-datavalue-flatbuffer-handling (VulnCheck Advisory: Wazuh - NULL Pointer Dereference in inventory_sync DataValue FlatBuffer Handling) third-party-advisory

cve.org (CVE-2026-56401)

nvd.nist.gov (CVE-2026-56401)

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