Wazuh up to 5.0.0-beta2 FlatBuffer DataValue ID null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k1.15+

Summaryinfo

A vulnerability described as critical has been identified in Wazuh up to 5.0.0-beta2. This issue affects some unknown processing of the component FlatBuffer DataValue Handler. Executing a manipulation of the argument ID can lead to null pointer dereference. The identification of this vulnerability is CVE-2026-56401. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Wazuh up to 5.0.0-beta2. It has been declared as critical. This vulnerability affects an unknown code block of the component FlatBuffer DataValue Handler. The manipulation of the argument id with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-56401 since 06/21/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available.

Upgrading to version 5.0.0-beta3 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Wazuh 5.0.0-beta3

Timelineinfo

06/21/2026 CVE reserved
07/08/2026 +17 days Advisory disclosed
07/08/2026 +0 days VulDB entry created
07/08/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-56401 (🔒)
GCVE (CVE): GCVE-0-2026-56401
GCVE (VulDB): GCVE-100-376864

Entryinfo

Created: 07/08/2026 16:54
Changes: 07/08/2026 16:54 (53)
Complete: 🔍
Cache ID: 216::103

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