CVSS 4.0
5.1 mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NCVE-2026-84305
Medium (5.1). EPSS 0.2% chance of exploitation in the next 30 days. Fixed in sqlparse 0.6.0.
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.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
- CWE
- CWE-407
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-cfqr-cjx5-5jcm | PyPI | sqlparse | <0.6.0 | 0.6.0 |
| PYSEC-2026-3923 | PyPI | sqlparse | <0.6.0 | 0.6.0 |
References
- https://github.com/andialbrecht/sqlparse/commit/a51df6d9e2d31b44be9adb6bc8732517db6bf96b
- 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