CVE-2026-59894: sqlparse Package 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 support for parsing, splitting, and formatting SQL statements. It is widely used in applications that require SQL manipulation and formatting. However, it has a vulnerability in its output modes that can lead to code injection if not properly handled.
Vulnerability Detail
The vulnerability arises from the way sqlparse generates Python and PHP code snippets from SQL input. The output filters escape quote characters but fail to escape existing backslashes first. This oversight allows crafted SQL to neutralize the quote escape, potentially terminating the intended string and injecting attacker-controlled code. If the generated snippet is executed by a downstream consumer, it can lead to arbitrary code execution in the consumer's environment. The affected output modes can be accessed through specific function calls, and the vulnerability is present in versions prior to 0.6.0.
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 modes that generate Python or PHP snippets from SQL until the package is updated. Ensure that any SQL input is sanitized and validated before processing.
Conclusion
The sqlparse package has a critical vulnerability (CVE-2026-59894) that allows for SQL string breakout due to improper escaping of backslashes. Users are advised to update to version 0.6.0 or later to mitigate this risk. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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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 use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If exploited, this vulnerability can lead to arbitrary code execution in the environment where the generated code snippet is executed, posing significant security risks.
Versions of sqlparse prior to 0.6.0 are affected by this vulnerability.
Run the command 'pip install --upgrade sqlparse' in your terminal to update to the latest patched version.
References
Related vulnerabilities
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