{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.6.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2f40da99b50d81135aecf96f6b08fcfa338a96de"
            }
          ],
          "repo": "https://github.com/andialbrecht/sqlparse",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-cfqr-cjx5-5jcm"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84305.json"
  },
  "details": "sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, sqlparse.format(sql, reindent=True) and sqlformat --reindent route attacker-controlled parenthesized tuple lists through ReindentFilter._get_offset() in sqlparse/filters/reindent.py, where _flatten_up_to_token() repeatedly rebuilds and joins the statement prefix. Thousands of offset calculations walk an expanding token tree, producing quadratic CPU consumption for inputs that remain below MAX_GROUPING_TOKENS and causing request delays, reduced throughput, or worker starvation. This issue is fixed in version 0.6.0.",
  "id": "CVE-2026-84305",
  "modified": "2026-09-02T03:30:48.946615799Z",
  "published": "2026-09-01T18:33:10.969Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84305.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/andialbrecht/sqlparse/commit/a51df6d9e2d31b44be9adb6bc8732517db6bf96b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/andialbrecht/sqlparse/releases/tag/0.6.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-cfqr-cjx5-5jcm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84305"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "sqlparse: Reindentation of tuple lists causes near-cap quadratic CPU consumption"
}