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: n/a
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

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

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-17T17:16:48.973Z

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

Link: CVE-2026-71491

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-71491

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T18:30:04Z

Weaknesses