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CVE-2026-34150— Wazuh: Heap buffer overflow in wazuh-analysisd via rootcheck event parsing

Quick assessment

Affected
wazuh wazuh
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wazuh是美国Wazuh公司开源的一个应用软件。用于收集,汇总,索引和分析安全数据,帮助组织检测入侵,威胁和行为异常。 Wazuh 4.14.5之前版本存在缓冲区错误漏洞，该漏洞源于wazuh-analysisd中堆缓冲区溢出，可能导致未经验证的远程攻击者使Wazuh manager分析引擎崩溃，造成SIEM告警处理完全丢失。

CVSS 7.5 · High EPSS 0.37% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
wazuh wazuh >= 1.0.0, < 4.14.5 affected
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I. Basic Information for CVE-2026-34150

Vulnerability Information
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Vulnerability Title
Wazuh: Heap buffer overflow in wazuh-analysisd via rootcheck event parsing
Source: CVE Program / CVE List V5
Vulnerability Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 1.0.0 and above, prior to 4.14.5, a heap buffer overflow in wazuh-analysisd allows an unauthenticated remote attacker to crash the Wazuh manager's analysis engine, causing complete loss of SIEM alert processing. The attack exploits the default configuration shipped in the official wazuh/wazuh-docker deployment with default configuration. An attacker can enroll with authd without a password to obtain a valid agent ID and encryption key, connect to remoted over the Wazuh agent protocol, and inject rootcheck events containing  {key: value}  patterns longer than 30 bytes that trigger a sprintf overflow of a 30-byte buffer in W_JSON_ParseRootcheck, corrupting the heap and crashing wazuh-analysisd so that all alert processing silently stops while the dashboard and API keep showing stale data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Wazuh 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wazuh是美国Wazuh公司开源的一个应用软件。用于收集,汇总,索引和分析安全数据,帮助组织检测入侵,威胁和行为异常。 Wazuh 4.14.5之前版本存在缓冲区错误漏洞，该漏洞源于wazuh-analysisd中堆缓冲区溢出，可能导致未经验证的远程攻击者使Wazuh manager分析引擎崩溃，造成SIEM告警处理完全丢失。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wazuh wazuh >= 1.0.0, < 4.14.5 -

II. Public POCs for CVE-2026-34150

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9020 chars
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III. Intelligence Information for CVE-2026-34150

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Vendor Advisories for CVE-2026-34150 (1)

Same Patch Batch · wazuh · 2026-07-16 · 5 CVEs total

CVE-2026-39359 7.5 HIGH Wazuh: Unauthenticated Path Traversal in authd via Agent Group Name
CVE-2026-33754 6.5 MEDIUM Wazuh: Unauthenticated cluster packet length leads to uncontrolled memory allocation (remo
CVE-2026-40106 4.7 MEDIUM Wazuh: Heap-based Buffer Overflow in syscheck Registry Wildcard Expansion (LPE / DoS)
CVE-2026-33434 4.3 MEDIUM Wazuh: Rate Limit Bypass via /events Endpoint

IV. Related Vulnerabilities

Same product: wazuh
Same vendor: wazuh
Same weakness: CWE-122

V. Comments for CVE-2026-34150

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