Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb

{
  "id": "6d88ee33f933a29939222bb14ae14aebf94c5ca130bd768038435ef611fd48b0",
  "url": "https://osv.dev/vulnerability/CVE-2026-74046",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb",
    "summary": "Wazuh 4.4.0 before 4.14.7 contains a denial of service vulnerability in the fdecompress_files() function within cluster.py that allows authenticated cluster peers to exhaust memory by supplying a malicious synchronization archive without decompressed size limits. Attackers holding a valid cluster Fernet key can upload a small, highly compressed zip bomb archive that forces wazuh-clusterd on the master node to decompress the full payload into memory, causing memory exhaustion and service disruption.",
    "evidence": "osv:CVE-2026-74046",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-74046",
      "aliases": [
        "CVE-2026-74046",
        "GHSA-mr7j-w2m4-vw5j"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wazuh/wazuh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2477e9fa50bc1424e834ac8401ce2450a5978e75"
                },
                {
                  "fixed": "a42268a27c555d9348d5598fb8751eaf4c8e9024"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.4.0"
                      },
                      {
                        "fixed": "4.14.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.4.0"
                      },
                      {
                        "fixed": "4.14.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74046.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.649752587Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74046.json",
        "https://github.com/wazuh/wazuh/security/advisories/GHSA-mr7j-w2m4-vw5j",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74046",
        "https://www.vulncheck.com/advisories/wazuh-dos-via-fdecompress-files-zip-bomb",
        "https://github.com/wazuh/wazuh/pull/37119",
        "https://github.com/wazuh/wazuh"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-409"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74046.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74046",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497791,
  "published_at": "2026-08-18T17:27:24.053+00:00"
}