{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:tdengine:tdengine:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "3.4.0.0"
              },
              {
                "fixed": "3.4.1.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "6e95fe58a4e69509bd36aacbbc052ab264526942"
            },
            {
              "fixed": "003e8a5f102f6ee24ada79e087bdbbea1442ca88"
            }
          ],
          "repo": "https://github.com/taosdata/tdengine",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vg95-j2hf-hvjx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-191"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42542.json"
  },
  "details": "TDengine is an open source, time-series database optimized for Internet of Things devices. In versions 3.4.0.0 through 3.4.1.5, an unauthenticated remote attacker can crash the taosd server process by sending a single crafted RPC packet. No credentials or prior session state are required. Version 3.4.1.6 fixes the issue.",
  "id": "CVE-2026-42542",
  "modified": "2026-07-08T05:37:58.949332179Z",
  "published": "2026-06-10T20:32:38.985Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42542.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42542"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)"
}