CVE-2026-71491

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.

Affected products

Sqlparse

CVSS 4.0

8.7 HIGH

Weakness

CWE-407, CWE-400

NVD status

Received

Published

2026-08-17