Description
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.
Published: 2026-08-17
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-f2ff-p2ww-7p4p sqlparse: Quadratic O(n²) DoS in group_comments
History

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1050
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important

Fri, 21 Aug 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Andialbrecht
Andialbrecht sqlparse
Vendors & Products Andialbrecht
Andialbrecht sqlparse

Mon, 17 Aug 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 17 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Description 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.
Title sqlparse: Quadratic O(n²) DoS in group_comments
Weaknesses CWE-400
CWE-407
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Andialbrecht Sqlparse
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-17T22:01:34.222Z

Reserved: 2026-08-06T19:56:23.725Z

Link: CVE-2026-71491

cve-icon Vulnrichment

Updated: 2026-08-17T22:00:15.893Z

cve-icon NVD

Status : Received

Published: 2026-08-17T18:18:12.120

Modified: 2026-08-17T22:17:26.670

Link: CVE-2026-71491

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-17T17:16:48Z

Links: CVE-2026-71491 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T21:00:04Z

Weaknesses