{"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":"2026-08-19T16:06:06.158Z"},"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"}}}}