CVE-2026-56401 | Wazuh wazuh-modulesd before 5.0.0-beta3 contains a null poin… | CVSS 6.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-56401
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-21 12:37 UTC
Published: 2026-07-08 13:49 UTC
Last updated: 2026-07-08 14:22 UTC
Primary CWE: CWE-476
NULL Pointer Dereference
Vendor / Product: Wazuh / Wazuh
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Wazuh	Wazuh	—	0 < 5.0.0-beta3, 5.0.0-beta3

Weakness (CWE)

CWE	Source	Description
CWE-476	cna	NULL Pointer Dereference

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.1	HIGH	4.0	cna	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
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (3)

GitHub Security Advisory (GHSA-6hxp-c9x3-qc7p) https://github.com/wazuh/wazuh/security/advisories/GHSA-6hxp-c9x3-qc7p
https://github.com/wazuh/wazuh/commit/3adf4f87942705aa0ceeba1e145c259cc9dcd242 https://github.com/wazuh/wazuh/commit/3adf4f87942705aa0ceeba1e145c259cc9dcd242
VulnCheck Advisory: Wazuh - NULL Pointer Dereference in inventory_sync DataValue FlatBuffer Handling https://www.vulncheck.com/advisories/wazuh-null-pointer-dereference-in-inventory-sync-datavalue-flatbuffer-handling