VDB
CVE-2026-84305
CVE-2026-84305
PUBLISHED
CVSS 5.1 MEDIUM
Reported by GitHub_M · Published September 1, 2026
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.
Risk Scores
CVSS 4.0
5.1
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| andialbrecht | sqlparse | < 0.6.0 |
| chainguard | dbt-bigquery | 0, 0 |
| andialbrecht | sqlparse | |
| andialbrecht | sqlparse | < 0.6.0, < 0.6.0 |
| chainguard | mlflow | 0 |
| chainguard | dbt-core | 0, 0 |
| wolfi | mlflow | 0, 0 |
| PyPI | sqlparse | 0 |
Timeline
- Sep 1, 2026 CVE Published
- Sep 1, 2026 Coalition ESS Score
- Sep 2, 2026 EPSS Score
- Sep 5, 2026 Security Advisory
- Sep 9, 2026 CVE Updated
References
- https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-cfqr-cjx5-5jcm x_refsource_CONFIRM
- https://github.com/andialbrecht/sqlparse/commit/a51df6d9e2d31b44be9adb6bc8732517db6bf96b x_refsource_MISC
- https://github.com/andialbrecht/sqlparse/releases/tag/0.6.0 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-84305 advisory
- https://github.com/advisories/GHSA-cfqr-cjx5-5jcm advisory