CVE-2026-44251
Wazuh : size_t underflow in msgs.c ReadSecMSG causes wazuh-remoted DoS and potential heap overflow via crafted agent message
Description
Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.0.0 and above, prior to 4.14.5, a size_t integer underflow in os_crypto/shared/msgs.c:389 allows any enrolled Wazuh agent to crash the wazuh-remoted process on the manager, immediately disconnecting all agents from the manager. A second code path reached by the same underflow may allow heap memory corruption. This issue has been fixed in version 4.14.5.
INFO
Published Date :
July 17, 2026, 2:18 a.m.
Last Modified :
July 20, 2026, 2:22 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Wazuh to version 4.14.5.
- Restart the wazuh-remoted process.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44251.
| URL | Resource |
|---|---|
| https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5r-5p7c-g9fq | Exploit Vendor Advisory |
| https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5r-5p7c-g9fq | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44251 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44251
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44251 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44251 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 20, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (excluding) 4.14.5 Added Reference Type GitHub, Inc.: https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5r-5p7c-g9fq Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5r-5p7c-g9fq Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 17, 2026
Action Type Old Value New Value Added Reference https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5r-5p7c-g9fq Added SSVC {'id': 'CVE-2026-44251', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-17T17:33:37.849028Z'} -
New CVE Received by [email protected]
Jul. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'wazuh', 'product': 'wazuh', 'versions': [{'status': 'affected', 'version': '>= 3.0.0, < 4.14.5'}]}] Added Description Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.0.0 and above, prior to 4.14.5, a size_t integer underflow in os_crypto/shared/msgs.c:389 allows any enrolled Wazuh agent to crash the wazuh-remoted process on the manager, immediately disconnecting all agents from the manager. A second code path reached by the same underflow may allow heap memory corruption. This issue has been fixed in version 4.14.5. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-191 Added CWE CWE-122 Added Reference https://github.com/wazuh/wazuh/security/advisories/GHSA-jv5r-5p7c-g9fq