CVE-2026-34150Public exploitNetwork attack vector

Unauthenticated SIEM outage via rootcheck heap overflow

Published Jul 16, 2026 · Updated Jul 16, 2026

Heap buffer overflow in wazuh-analysisd in Wazuh before 4.14.5 allows remote attackers to crash SIEM alert processing via rootcheck events. W_JSON_ParseRootcheck writes regex-captured {key: value} content without bounds through sprintf into a 30-byte heap allocation. Default Docker settings permit passwordless agent enrollment and enable the JSON path; heap corruption stops analysisd while the API and dashboard continue serving stale data.

CVSS severity7.5
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in wazuh-analysisd in Wazuh before 4.14.5 allows remote attackers to crash SIEM alert processing via rootcheck events. W_JSON_ParseRootcheck writes regex-captured {key: value} content without bounds through sprintf into a 30-byte heap allocation. Default Docker settings permit passwordless agent enrollment and enable the JSON path; heap corruption stops analysisd while the API and dashboard continue serving stale data.

The record

CVE
CVE-2026-34150
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
Wazuh
Product
Wazuh
Classifications
CWE-122, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.0.0, < 4.14.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wazuh · Wazuhversion=>= 1.0.0, < 4.14.5

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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