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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| flask-cors | pip | <= 4.0.0 | 4.0.1 |
The vulnerability stems from the LOG.debug() call in the cors_after_request handler, which directly logs the raw request.path value. Since request.path is user-controlled and contains CRLF sequences from malicious requests, it gets written to logs without sanitization. This matches the CWE-117 description and the advisory's mention of improper log output neutralization. The code snippet from extension.py line 194 context shows the vulnerable logging pattern.
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