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Product · Kludex

python-multipart

9 known vulnerabilities.

python-multipart at a glance

Last 12 months
7
Critical · all time
0
Exploited · all time
0
Public exploit · all time
1
New vulnerabilities per month · last 12 months
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9 results · Feed

  • Low 3.7

    Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory

    Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.31, parse_form() did not validate the Content-Length header before using it to bound its chunked read of the request body. A negative Content-Length turned the bounded read into a read-…

  • Low 3.7

    Python-Multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters

    Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, parse_options_header parsed Content-Disposition (and Content-Type) headers with email.message.Message, which transparently applies RFC 2231/5987 decoding. The extended parameter syn…

  • Low 3.7

    Python-Multipart: Semicolon treated as querystring field separator enables parameter smuggling

    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 (…

  • High 7.5

    Python-Multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service

    Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, when parsing application/x-www-form-urlencoded bodies, QuerystringParser located the field separator with a two step lookup: it first scanned the entire remaining buffer for &, and …

  • High 7.5

    Python-Multipart: Denial of Service via unbounded multipart part headers

    Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.27, python-multipart has a denial of service vulnerability in multipart part header parsing. When parsing multipart/form-data, MultipartParser previously had no limit on the number of p…

  • Medium 5.3

    Python-Multipart affected by Denial of Service via large multipart preamble or epilogue data

    Python-Multipart is a streaming multipart parser for Python. Versions prior to 0.0.26 have a denial of service vulnerability when parsing crafted `multipart/form-data` requests with large preamble or epilogue sections. Upgrade to version 0.0.26 or later, whic…

  • High 8.6
    CVE-2026-24486 Public exploit

    Python-Multipart has Arbitrary File Write via Non-Default Configuration

    Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbi…

  • High 7.5

    python-multipart has a Denial of service (DoS) via deformation `multipart/form-data` boundary

    python-multipart is a streaming multipart parser for Python. When parsing form data, python-multipart skips line breaks (CR \r or LF \n) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a …

  • High 7.5

    python-multipart vulnerable to content-type header Regular expression Denial of Service

    `python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is ve…