# CVE-2026-54284

## Summary

- **CVE ID:** CVE-2026-54284
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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)
- **CWE:** CWE-407, CWE-1333
- **Published:** Aug 17, 2026
- **Last Modified:** Aug 17, 2026

## Description

sqlparse is a non-validating SQL parser module for Python. Prior to 0.6.0, TokenList construction and string conversion in sqlparse/sql.py repeatedly flatten nested token subtrees constructed by group_parenthesis and group_case, causing quadratic CPU consumption through sqlparse.parse(), sqlparse.format(), and sqlparse.split() before depth and token limits terminate processing. This issue is fixed in version 0.6.0.

## Affected Products

- andialbrecht — sqlparse (< 0.6.0)

## References

- [CNA](https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-pwgv-4x5q-6m9f)
- [CNA](https://github.com/andialbrecht/sqlparse/commit/939b129e24c0ad5d51368b1aa72fffcaca76f06f)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 18.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._