Vulnerability Description
sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, sqlparse.format(sql, reindent=True) and sqlformat --reindent route attacker-controlled parenthesized tuple lists through ReindentFilter._get_offset() in sqlparse/filters/reindent.py, where _flatten_up_to_token() repeatedly rebuilds and joins the statement prefix. Thousands of offset calculations walk an expanding token tree, producing quadratic CPU consumption for inputs that remain below MAX_GROUPING_TOKENS and causing request delays, reduced throughput, or worker starvation. This issue is fixed in version 0.6.0.
Related Weaknesses (CWE)
References
- https://github.com/andialbrecht/sqlparse/commit/a51df6d9e2d31b44be9adb6bc8732517
- https://github.com/andialbrecht/sqlparse/releases/tag/0.6.0
- https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-cfqr-cjx5-5jcm
- https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-cfqr-cjx5-5jcm
FAQ
What is CVE-2026-84305?
CVE-2026-84305 is a documented vulnerability. sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, sqlparse.format(sql, reindent=True) and sqlformat --reindent route attacker-controlled parenthesized tuple lists through Rein...
How severe is CVE-2026-84305?
CVSS scoring is not yet available for CVE-2026-84305. Check NVD for updates.
Is there a patch for CVE-2026-84305?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.