CVE-2026-59894: sqlparse Vulnerability Allows SQL String Breakout Through Unescaped Backslashes
Summary
CVE-2026-59894: sqlparse: Generated Python and PHP snippets allow SQL string breakout through unescaped backslashes. Affects sqlparse versions < 0.6.0. Fixed in 0.6.0. How to fix ↓
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Background
sqlparse is a non-validating SQL parser for Python that provides a way to format SQL statements. It is widely used in applications that require SQL parsing and formatting capabilities. The package allows users to generate code snippets in Python and PHP from SQL queries. However, it has a vulnerability that can lead to code injection if the generated snippets are executed without proper validation.
Vulnerability Detail
The vulnerability arises from the way sqlparse handles backslashes in the output modes for Python and PHP. When generating code snippets, sqlparse escapes quote characters but fails to escape existing backslashes first. This oversight allows an attacker to craft SQL that can neutralize the quote escape mechanism, leading to the injection of arbitrary code into the generated snippets. If these snippets are executed in a downstream environment, it can result in code execution with the permissions of the executing process, posing a significant security risk.
How To Fix
Latest published version: 0.6.0 as of 23 Oct 2026
pip install --upgrade "sqlparse==0.6.0"The newest release already contains this fix.
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Workaround
As a temporary workaround, avoid using the output formats for Python and PHP in sqlparse until the package is updated. If you must use these formats, ensure that any generated snippets are thoroughly reviewed and sanitized before execution.
Conclusion
The sqlparse vulnerability (CVE-2026-59894) poses a significant risk due to its potential for code injection through improperly handled backslashes in generated snippets. It is crucial to update to the patched version or implement workarounds to mitigate this risk.
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FAQ
CVE-2026-59894 is a vulnerability in the sqlparse package that allows for SQL string breakout through unescaped backslashes, potentially leading to code injection.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which monitors and alerts for open-source vulnerabilities without requiring any signup.
The CVSS score of this vulnerability is 6.2, indicating a moderate level of risk.
If you cannot update sqlparse immediately, avoid using the vulnerable output formats and ensure that any generated code snippets are reviewed before execution.
More information about sqlparse can be found on its official PyPI page and GitHub repository, where you can also track updates and issues.
References
Related vulnerabilities
Recent vulnerabilities recorded for sqlparse.
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