{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "4.0.0"
              },
              {
                "last_affected": "4.5.34"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "last_affected": "5.0.12"
              },
              {
                "introduced": "5.1.0"
              },
              {
                "last_affected": "5.1.9"
              },
              {
                "introduced": "5.2.0"
              },
              {
                "last_affected": "5.2.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "9d9d56dc8bcd30e525e177ff462212b11c55dd07"
            },
            {
              "last_affected": "6acce64664eabc086fc0fe1ea0ad9a21a153594c"
            },
            {
              "introduced": "6837af793026a2fba5b6b32e0161fce6d9c8b691"
            },
            {
              "last_affected": "fb40976c228a72763d595bbb8499feabd39166f1"
            },
            {
              "introduced": "1d93c2e48aafcaa38af40154205c7810f66e1cc2"
            },
            {
              "last_affected": "84f06a87043a873160492923154b044c80b16f32"
            },
            {
              "introduced": "3708bdc1d328afce37abd39dba932399a0469742"
            },
            {
              "last_affected": "3708bdc1d328afce37abd39dba932399a0469742"
            }
          ],
          "repo": "https://github.com/eclipse-vertx/vertx-sql-client",
          "type": "GIT"
        }
      ],
      "versions": [
        "5.2.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-j4vf-w939-pgxf"
  ],
  "database_specific": {
    "cna_assigner": "eclipse",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102469.json"
  },
  "details": "In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x DB2 client (vertx-db2-client) contains DRDA protocol handling code that deserializes User Defined Type (UDT) column data using a bare ObjectInputStream.readObject() call with no ObjectInputFilter or class allowlist.\n\n\n\nThis code path is triggered when a DRDA server sends a result set with a column tagged as UDT (FDOCA protocol LID 0x50). However, DB2 does not support this type of UDT. The FDOCA 0x50 type is never sent by a legitimate DB2 server.\n\n\n\nNevertheless, a malicious or man-in-the-middle DRDA server could craft a response with a 0x50-tagged column, causing the client to deserialize arbitrary attacker-controlled bytes on the Vert.x event loop before any application code can inspect or reject the data. If a Java deserialization gadget chain is present on the application's classpath, this enables remote code execution. Without a gadget chain, denial of service is possible via crafted object graphs. TLS is disabled by default, making man-in-the-middle exploitation feasible.\n\n\n\nThe impacted component is io.vertx:vertx-db2-client.",
  "id": "CVE-2026-102469",
  "modified": "2026-10-16T02:31:01.342359463Z",
  "published": "2026-10-15T08:11:33.465Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102469.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-j4vf-w939-pgxf"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/347"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102469"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ]
}