CVE-2026-44253 Details
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.
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Exploit prediction scoring system (EPSS) score for CVE-2026-44253
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.61 Probability of exploitation activity being observed over the next 30 days (49th percentile)
CVSS score for CVE-2026-44253
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
4.9 Medium
Products affected by CVE-2026-44253
Wazuh 4.9.1
Wazuh 4.9.2
Wazuh 4.10.0
Wazuh 4.10.2
Wazuh 4.10.3
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2026-44253 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 201 34.30%
DE 58 9.90%
ID 42 7.17%
SG 40 6.83%
FR 33 5.63%
IN 30 5.12%
GB 26 4.44%
CA 11 1.88%
BR 10 1.71%
NL 8 1.37%

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CVE-2026-44253 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 436 91.40%
Telecommunications 26 5.45%
Government/Politics 6 1.26%
Education 4 0.84%
Manufacturing 2 0.42%
Business Services 2 0.42%
Tourism/Hospitality 1 0.21%

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