Vulnerabilities CVE-2026-71491

CVE-2026-71491

High

Open

TLP:CLEAR

sqlparse: Quadratic O(n²) DoS in group_comments

NVD CVE.org

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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.

Details

CVSS Score: 8.7
CVSS 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
Confidence: 90%
Published: Aug 17, 2026
Last Modified: Aug 17, 2026

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