BREW-SQLPARSE-CVE-2026-84305 (CVE-2026-84305)

Vulnerability from osv_homebrew – Published: 2026-09-02 10:05 – Updated: 2026-09-10 21:02 – Source website
VLAI
Summary
sqlparse: Reindentation of tuple lists causes near-cap quadratic CPU consumption
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.

Severity
5.1 (Medium)
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
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "0.6.0"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "sqlparse",
        "purl": "pkg:brew/sqlparse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/andialbrecht/sqlparse",
        "name": "https://github.com/andialbrecht/sqlparse",
        "strategy": "git",
        "subject_version": "0.6.0"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/sqlparse@0.6.0",
        "name": "sqlparse",
        "strategy": "registry",
        "subject_version": "0.6.0"
      },
      {
        "ecosystem": "Debian",
        "key": "Debian/sqlparse",
        "name": "sqlparse",
        "strategy": "distro"
      },
      {
        "ecosystem": "GIT",
        "key": "upstream:https://github.com/andialbrecht/sqlparse",
        "name": "https://github.com/andialbrecht/sqlparse",
        "strategy": "distro",
        "subject_version": "0.6.0"
      },
      {
        "ecosystem": "PyPI",
        "key": "upstream:pkg:pypi/sqlparse@0.6.0",
        "name": "sqlparse",
        "strategy": "distro",
        "subject_version": "0.6.0"
      },
      {
        "ecosystem": "Ubuntu",
        "key": "Ubuntu/sqlparse",
        "name": "sqlparse",
        "strategy": "distro"
      }
    ]
  },
  "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": "BREW-sqlparse-CVE-2026-84305",
  "modified": "2026-09-10T21:02:13Z",
  "published": "2026-09-02T10:05:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/andialbrecht/sqlparse/releases/tag/0.6.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84305.json"
    },
    {
      "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"
    },
    {
      "type": "FIX",
      "url": "https://github.com/andialbrecht/sqlparse/commit/a51df6d9e2d31b44be9adb6bc8732517db6bf96b"
    }
  ],
  "schema_version": "1.7.3",
  "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",
  "upstream": [
    "CVE-2026-84305",
    "GHSA-cfqr-cjx5-5jcm",
    "PYSEC-2026-3923"
  ]
}



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