CVE-2026-44253 Vulnerability Analysis & Exploit Details

CVE-2026-44253
Vulnerability Scoring

4.9
/10
Medium Risk

The vulnerability CVE-2026-44253 could compromise system integrity but typically requires user interaction to be exploited.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: High
    High-level privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-44253 Details

Status: Analyzed

Last updated: 🕢 22 Sep 2026, 19:47 UTC
Originally published on: 🕓 19 Aug 2026, 16:17 UTC

Time between publication and last update: 34 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-44253 Vulnerability Summary

CVE-2026-44253: Wazuh is a free and open source platform used for threat prevention, detection, and response. From 3.9.0 until 4.14.5 and 5.0.0-beta2, the Wazuh cluster protocol in framework/wazuh/core/cluster/common.py allows an authenticated cluster node to exhaust memory on the master. The receive_str() method accepts an attacker-controlled total for InBuffer without a maximum, so a new_str command can request a multi-gigabyte bytearray and repeated requests accumulate in in_str. The divided-message path also retains flag_divided fragments under unique counters in div_msg_box without a count, aggregate-size, or expiration limit. Exploitation can disrupt agent connectivity and alert processing across the monitored environment. This issue is fixed in versions 4.14.5 and 5.0.0-beta2.

Assessing the Risk of CVE-2026-44253

Access Complexity Graph

The exploitability of CVE-2026-44253 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-44253

The exploitability of CVE-2026-44253 is influenced by multiple factors. Security teams should analyze system configurations and apply appropriate countermeasures to mitigate threats.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-44253, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-44253, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-44253 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2026-44253 poses no threat to data integrity.
  • Availability: High
    CVE-2026-44253 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-44253 References

External References

CWE Common Weakness Enumeration

CWE-789

Vulnerable Configurations

  • cpe:2.3:a:wazuh:wazuh:3.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.9.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.9.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.9.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.9.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.9.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.9.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.10.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.10.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.10.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.10.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.11.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.11.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.11.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.11.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.11.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.11.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.11.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.11.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.11.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.12.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.12.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.12.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.12.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.12.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.12.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.12.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.12.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:3.13.6:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:3.13.6:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.1.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.6:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.6:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.2.7:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.2.7:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.6:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.6:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.7:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.7:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.8:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.8:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.9:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.9:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.10:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.10:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.3.11:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.3.11:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.4.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.4.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.7.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.7.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.7.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.7.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.7.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.7.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.7.5:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.7.5:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.5:-:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.5:-:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.10.5:rc1:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.10.5:rc1:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.11.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.11.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.11.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.12.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.12.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.13.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.13.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.13.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.13.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.14.0:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.14.0:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.14.1:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.14.1:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.14.2:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.14.2:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.14.3:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.14.3:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:4.14.4:*:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:4.14.4:*:*:*:*:*:*:*
  • cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*
    cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*

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