CVE catalog

CVE-2026-71491

SQL parse vulnerabilities

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, group_comments in sqlparse/engine/grouping.py repeatedly rescans comment-only statements before the MAX_GROUPING_TOKENS guard, causing quadratic CPU consumption through sqlparse.parse() and sqlparse.format(sql, strip_comments=True). This issue is fixed in version 0.6.0.

Severity: High · CVSS 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Aug 17, 2026, 5:16:48 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.26% · Oct 27, 2026

Projects and upstream resources

[sqlparse][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "sqlparse",
      "status": "vulnerable",
      "release": "sid",
      "version": "0.5.5-2"
    },
    {
      "name": "sqlparse",
      "status": "vulnerable",
      "release": "forky",
      "version": "0.5.5-2"
    },
    {
      "name": "sqlparse",
      "status": "vulnerable",
      "release": "trixie",
      "version": "0.5.3-1"
    },
    {
      "name": "sqlparse",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "0.4.2-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1144932,
      "name": "sqlparse",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1144932,
      "name": "sqlparse",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1144932,
      "name": "sqlparse",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1144932,
      "name": "sqlparse",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "sqlparse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.0"
            }
          ]
        }
      ],
      "ecosystem": "PyPI",
      "fixed_version": "0.6.0",
      "provider_record_id": "PYSEC-2026-3697"
    },
    {
      "name": "sqlparse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.0"
            }
          ]
        }
      ],
      "ecosystem": "PyPI",
      "fixed_version": "0.6.0",
      "provider_record_id": "GHSA-F2FF-P2WW-7P4P"
    },
    {
      "name": "sqlparse",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "0.4.4-1ubuntu0.2",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "0.4.4-1ubuntu0.2"
    },
    {
      "name": "python-sqlparse-doc",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "0.4.4-1ubuntu0.2",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "0.4.4-1ubuntu0.2"
    },
    {
      "name": "python3-sqlparse",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "0.4.4-1ubuntu0.2",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "0.4.4-1ubuntu0.2"
    },
    {
      "name": "sqlformat",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "0.4.4-1ubuntu0.2",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "0.4.4-1ubuntu0.2"
    },
    {
      "name": "sqlparse",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.4-3ubuntu0.1+esm1"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "0.2.4-1",
        "0.2.4-1build1",
        "0.2.4-2",
        "0.2.4-3",
        "0.2.4-3ubuntu0.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "0.2.4-3ubuntu0.1+esm1",
      "provider_record_id": "UBUNTU-CVE-2026-71491"
    },
    {
      "name": "sqlparse",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.2-1ubuntu0.22.04.3"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "0.4.1-1ubuntu1",
        "0.4.2-1",
        "0.4.2-1ubuntu0.22.04.1",
        "0.4.2-1ubuntu0.22.04.2"
      ],
      "ecosystem": "deb",
      "fixed_version": "0.4.2-1ubuntu0.22.04.3",
      "provider_record_id": "UBUNTU-CVE-2026-71491"
    },
    {
      "name": "sqlparse",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.4-1ubuntu0.2"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "0.4.2-1ubuntu1",
        "0.4.4-1",
        "0.4.4-1ubuntu0.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "0.4.4-1ubuntu0.2",
      "provider_record_id": "UBUNTU-CVE-2026-71491"
    },
    {
      "name": "sqlparse",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.4-1ubuntu0.1"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "0.5.3-1",
        "0.5.4-1"
      ],
      "ecosystem": "deb",
      "fixed_version": "0.5.4-1ubuntu0.1",
      "provider_record_id": "UBUNTU-CVE-2026-71491"
    }
  ]
}

[Debian bug #1144932]

Publisher notes

[trixie] sqlparse: Minor issue [bookworm] sqlparse: Minor issue, DoS

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[python3-sqlparse]Unknown
Source package: [sqlparse]
Details (2)
- 0.4.2-1+deb12u1 · all · bookworm
  Affected
  usn · sqlparse · debian · bookworm; usn · sqlparse · debian · 12
- 0.4.2-1+deb12u1 · all · bookworm
  Affected
  usn · sqlparse · debian · bookworm; usn · sqlparse · debian · 12
[python-sqlparse-doc]Unknown
Source package: [sqlparse]
Details (2)
- 0.4.2-1+deb12u1 · all · bookworm
  Affected
  usn · sqlparse · debian · bookworm; usn · sqlparse · debian · 12
- 0.4.2-1+deb12u1 · all · bookworm
  Affected
  usn · sqlparse · debian · bookworm; usn · sqlparse · debian · 12
[sqlformat]Unknown
Source package: [sqlparse]
Details (2)
- 0.4.2-1+deb12u1 · all · bookworm
  Affected
  usn · sqlparse · debian · bookworm; usn · sqlparse · debian · 12
- 0.4.2-1+deb12u1 · all · bookworm
  Affected
  usn · sqlparse · debian · bookworm; usn · sqlparse · debian · 12

[Debian 13 (Trixie)]

[python3-sqlparse]Unknown
Source package: [sqlparse]
Details (2)
- 0.5.3-1 · all · trixie
  Affected
  usn · sqlparse · debian · 13
- 0.5.3-1 · all · trixie
  Affected
  usn · sqlparse · debian · 13
[python-sqlparse-doc]Unknown
Source package: [sqlparse]
Details (2)
- 0.5.3-1 · all · trixie
  Affected
  usn · sqlparse · debian · 13
- 0.5.3-1 · all · trixie
  Affected
  usn · sqlparse · debian · 13
[sqlformat]Unknown
Source package: [sqlparse]
Details (2)
- 0.5.3-1 · all · trixie
  Affected
  usn · sqlparse · debian · 13
- 0.5.3-1 · all · trixie
  Affected
  usn · sqlparse · debian · 13

Observed: Oct 23, 2026, 9:39:10 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]