CVE-2026-40347 | BDVDB-2026-327596 Detail

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.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-04-17Record published in the CVE List.
2. Version 22026-04-20Most recent update recorded in the CVE List.