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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-40347

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

Description

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, which skips ahead to the next boundary candidate when processing leading CR/LF data and immediately discards epilogue data after the closing boundary.

Affected products

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

Kludex python-multipart

  • < 0.0.26affected

References