CVE-2026-26204

Published: Apr 29, 2026 Last Modified: Apr 30, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 4,4
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: high
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation Available

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. Due to unsigned integer underflow and pointer arithmetic wrapping, the write lands at offset -1 from the buffer, corrupting heap metadata. A malicious actor can potentially leverage this issue through a compromised agent to cause denial of service or heap corruption by injecting a specially crafted alert into the alerts log file monitored by wazuh-logcollector. This issue has been patched in version 4.14.4.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0002
Percentile
0,0th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

124

Buffer Underwrite ('Buffer Underflow')

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Confidentiality Access Control Other
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Bypass Protection Mechanism Other
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: Medium
View CWE Details
191

Integer Underflow (Wrap or Wraparound)

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality Access Control
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Instability Modify Memory Execute Unauthorized Code Or Commands Bypass Protection Mechanism
Applicable Platforms
Languages: C, C#, C++, Java
View CWE Details
Application

Wazuh by Wazuh

Product Information
Vendor Wazuh
Product Wazuh
Version Range Affected
From 1.0.0 (inclusive)
To 4.14.4 (exclusive)
cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c…
https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c7-hwjw-8857
https://github.com/wazuh/wazuh/releases/tag/v4.14.4
https://github.com/wazuh/wazuh/releases/tag/v4.14.4
https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c…
https://github.com/wazuh/wazuh/security/advisories/GHSA-j4c7-hwjw-8857