{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "4.0.0"
              },
              {
                "fixed": "4.14.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "8c2c62a6e9dcbcf2c792f7924e8cfdb26842820b"
            },
            {
              "fixed": "5933ec9ebee76fb2546e5f7fc9f3a27d0aeca605"
            }
          ],
          "repo": "https://github.com/wazuh/wazuh",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qvqj-p8mm-r7h3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-124",
      "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41499.json"
  },
  "details": "Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, multiple heap-based out-of-bounds WRITE vulnerabilities exist in parse_uname_string() (remoted_op.c). This function processes OS identification data from agents and contains a dangerous code pattern that appears in 4 locations within the same function: writing to strlen(ptr) - 1 without checking for empty strings. When the string is empty, strlen() returns 0, and 0 - 1 wraps to SIZE_MAX due to unsigned integer underflow. Due to pointer arithmetic wrapping, SIZE_MAX effectively becomes -1, causing a write exactly 1 byte before the allocated buffer. This corrupts heap metadata (e.g., the chunk size field in glibc malloc), leading to heap corruption. This issue has been patched in version 4.14.4.",
  "id": "CVE-2026-41499",
  "modified": "2026-07-15T01:49:14.492690602Z",
  "published": "2026-04-29T18:01:25.078Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41499.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-qvqj-p8mm-r7h3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41499"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Wazuh: Multiple Heap-based NULL WRITE Buffer Underflows in parse_uname_string()"
}