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CVE PROGRAM SOURCE RECORD3.7 Low

CVE-2026-53540

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

Description

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-until-EOF, so the entire body was loaded into memory in a single read instead of in fixed-size chunks. This vulnerability is fixed in 0.0.31.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Kludex python-multipart

  • < 0.0.31affected

References