Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/andialbrecht/sqlparse/commit/ef2012a5eeb491e604dea2b00d516904
- https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-f2ff-p2ww-7p4p
FAQ
What is CVE-2026-71491?
CVE-2026-71491 is a documented vulnerability. 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...
How severe is CVE-2026-71491?
CVSS scoring is not yet available for CVE-2026-71491. Check NVD for updates.
Is there a patch for CVE-2026-71491?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.