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CVE-2026-33754

Wazuh: Unauthenticated cluster packet length leads to uncontrolled memory allocation (remote DoS)

Published: Jul 16, 2026Updated: Jul 20, 2026 Sources: CVE List NVDCWE-400
6.5MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 60.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length. The length is trusted before authentication/decryption and used directly to allocate memory, allowing unauthenticated denial of service of the cluster service. This issue has been fixed in version 4.14.5.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-400

Affected Products

wazuh
oss-projectaka wazuh-manager, wazuh agent
wazuhMixed
Security Products / siem-soar

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-476v-28pp-5wg9
github.com

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