{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.0.14"
              },
              {
                "introduced": "4.0.0"
              },
              {
                "fixed": "4.0.7"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.0.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "1767a517f9c99ec97160cacb452fdcfd83dca9be"
            },
            {
              "fixed": "463bae029a4426deff7e9bb08a8317aaa398c7c7"
            },
            {
              "introduced": "141bb5491d24cb363f03c5a0786a32f73a1faa5b"
            },
            {
              "fixed": "26f6881c9eac77c5e3166d209682c0ebe8dd07c0"
            },
            {
              "introduced": "af1546f15fa871b313ebcc7df1fd2df3c396c616"
            },
            {
              "fixed": "f6d83a28c009ab039ea40ffdb4ccc58f190dfbe6"
            }
          ],
          "repo": "https://github.com/firebirdsql/firebird",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7cq5-994r-jhrf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-190",
      "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28214.json"
  },
  "details": "Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.",
  "id": "CVE-2026-28214",
  "modified": "2026-07-08T05:37:37.523069781Z",
  "published": "2026-04-17T18:35:46.974Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28214.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7cq5-994r-jhrf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28214"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Firebird server hangs when using specific clumplet on batch creation"
}