PYSEC-2026-3039 python-multipart has Denial of Service via unbounded multipart part headers

Summary 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 part headers or the size of an individual part header. An attacker could send a request with either many...

Allocation of Resources Without Limits or Throttling

Overview python-multipart is an A streaming multipart parser for Python Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the multipart/form-data, when line breaks: CR \r or LF \n in front of the first boundary and any tailing bytes...