References to Advisories, Solutions, and Tools

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Change History

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse (since the CVE-2021-23336 fix) treat only & as a separator. This creates a parser differential: the same bytes are tokenized into different fields than a WHATWG compliant intermediary would produce, allowing an attacker to smuggle extra form fields past an upstream body inspecting component. This vulnerability is fixed in 0.0.30.

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE-436

CWE-444

https://github.com/Kludex/python-multipart/security/advisories/GHSA-6jv3-5f52-599m

[{"vendor":"Kludex","product":"python-multipart","versions":[{"version":"< 0.0.30","status":"affected"}]}]