{"uuid": "4ef10641-f08d-47b8-9c5d-026bb8919fb3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-54284", "type": "seen", "source": "https://gist.github.com/alon710/a26678c544088f973903ab1017f94b18", "content": "# CVE-2026-54284: CVE-2026-54284: Algorithmic Complexity Exhaustion in sqlparse Engine\n\n> **CVSS Score:** 8.7\n> **Published:** 2026-08-17\n> **Full Report:** https://cvereports.com/reports/CVE-2026-54284\n\n## Summary\nAn algorithmic complexity vulnerability in the python-sqlparse library allows remote, unauthenticated attackers to cause a Denial of Service (DoS) via resource exhaustion. By transmitting a carefully constructed SQL statement containing deeply nested structures, an attacker can trigger quadratic CPU consumption within the parsing engine. This behavior bypasses the built-in depth limits because the performance degradation occurs during the initial recursive tree construction, causing the application process to hang.\n\n## TL;DR\nA vulnerability in the python-sqlparse library before version 0.6.0 allows remote attackers to cause a complete Denial of Service (DoS) via high CPU utilization. This is achieved by sending crafted SQL strings with deeply nested structures, which bypass the parser's defensive limits and trigger quadratic processing complexity.\n\n## Exploit Status: POC\n\n## Technical Details\n\n- **CWE ID**: CWE-407\n- **Attack Vector**: Network\n- **CVSS v4.0 Score**: 8.7\n- **Exploit Status**: poc\n- **CISA KEV Status**: No\n- **Remediation Priority**: High\n\n## Affected Systems\n\n- Applications utilizing the python-sqlparse library to parse, format, or analyze SQL strings.\n- Web Application Firewalls (WAFs) and security utilities using python-sqlparse for SQL injection detection.\n- Database administration panels and query formatting interfaces running vulnerable Python backends.\n- **sqlparse**: < 0.6.0 (Fixed in: `0.6.0`)\n\n## Mitigation\n\n- Upgrade sqlparse package to version 0.6.0 or newer to patch the underlying recursive parsing behavior.\n- Implement rate-limiting on endpoints that accept and process raw SQL inputs.\n- Deploy input-length restrictions at the API gateway layer to prevent oversized payloads.\n- Configure aggressive worker timeouts in the WSGI/ASGI application server configuration to auto-recycle locked threads.\n\n**Remediation Steps:**\n1. Identify all internal services and libraries that depend on the `sqlparse` Python package.\n2. Update your project's dependency definition file (e.g., `requirements.txt`, `Pipfile`, or `pyproject.toml`) to reference `sqlparse>=0.6.0`.\n3. Rebuild and redeploy application containers to apply the updated library package.\n4. Verify the patch execution by running a regression test using a moderately nested SQL test case to ensure parsing completes instantaneously.\n\n## References\n\n- [Fix Commit in andialbrecht/sqlparse Repository](https://github.com/andialbrecht/sqlparse/commit/939b129e24c0ad5d51368b1aa72fffcaca76f06f)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-54284) - Automated Vulnerability Intelligence*", "creation_timestamp": "2026-08-18T12:32:39.575281Z"}