{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-44253",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-05T16:33:55.844Z",
        "datePublished": "2026-08-19T16:06:06.158Z",
        "dateUpdated": "2026-08-25T02:13:49.793Z"
    },
    "containers": {
        "cna": {
            "title": "Wazuh: Cluster Protocol Memory Exhaustion (DoS) via unbounded receive_str allocation and div_msg_box accumulation",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-789",
                            "lang": "en",
                            "description": "CWE-789: Memory Allocation with Excessive Size Value",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-770",
                            "lang": "en",
                            "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "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"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/wazuh/wazuh/security/advisories/GHSA-h5r8-gvhv-cmp2",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-h5r8-gvhv-cmp2"
                },
                {
                    "name": "https://github.com/wazuh/wazuh/pull/35173",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wazuh/wazuh/pull/35173"
                },
                {
                    "name": "https://github.com/wazuh/wazuh/commit/d29c5c89a0e16477545ca27f4e06229021e3183c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wazuh/wazuh/commit/d29c5c89a0e16477545ca27f4e06229021e3183c"
                },
                {
                    "name": "https://github.com/wazuh/wazuh/releases/tag/v4.14.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.5"
                }
            ],
            "affected": [
                {
                    "vendor": "wazuh",
                    "product": "wazuh",
                    "versions": [
                        {
                            "version": ">= 3.9.0, < 4.14.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.0.0-beta1, < 5.0.0-beta2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-19T16:06:06.158Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-h5r8-gvhv-cmp2",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-h5r8-gvhv-cmp2",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-25T02:13:22.111115Z",
                                "id": "CVE-2026-44253",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-25T02:13:49.793Z"
                }
            }
        ]
    }
}