CVE-2026-44253

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{"affected": [{"affectedData": [{"product": "wazuh", "vendor": "wazuh", "versions": [{"status": "affected", "version": ">= 3.9.0, < 4.14.5"}, {"status": "affected", "version": ">= 5.0.0-beta1, < 5.0.0-beta2"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "matchCriteriaId": "769B2796-8746-40EA-A39F-18EE80F9F15A", "versionEndExcluding": "4.14.5", "versionStartIncluding": "3.9.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*", "matchCriteriaId": "007B01AA-AED0-4E92-8999-07E74B630460", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Wazuh es una plataforma de c\u00f3digo abierto y gratuita utilizada para la prevenci\u00f3n, detecci\u00f3n y respuesta a amenazas. Desde la versi\u00f3n 3.9.0 hasta la 4.14.5 y la 5.0.0-beta2, el protocolo de cl\u00faster de Wazuh en framework/wazuh/core/cluster/common.py permite que un nodo de cl\u00faster autenticado agote la memoria en el maestro. El m\u00e9todo receive_str() acepta un total controlado por el atacante para InBuffer sin un m\u00e1ximo, por lo que un comando new_str puede solicitar un bytearray de varios gigabytes y las solicitudes repetidas se acumulan en in_str. La ruta de mensajes divididos tambi\u00e9n retiene fragmentos flag_divided bajo contadores \u00fanicos en div_msg_box sin un l\u00edmite de conteo, tama\u00f1o agregado o expiraci\u00f3n. La explotaci\u00f3n puede interrumpir la conectividad del agente y el procesamiento de alertas en todo el entorno monitoreado. Este problema est\u00e1 solucionado en las versiones 4.14.5 y 5.0.0-beta2."}], "id": "CVE-2026-44253", "lastModified": "2026-10-27T11:10:00.193", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-44253", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-25T02:13:22.111115Z", "version": "2.0.3"}}]}, "published": "2026-08-19T16:17:10.833", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/wazuh/wazuh/commit/d29c5c89a0e16477545ca27f4e06229021e3183c"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/wazuh/wazuh/pull/35173"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Release Notes"], "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.5"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-h5r8-gvhv-cmp2"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-h5r8-gvhv-cmp2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}, {"lang": "en", "value": "CWE-789"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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