CVE-2026-40347
MEDIUM
NVD
CVSS Score
5.3
Severity
MEDIUM
Published
Apr 18, 2026
Vendor
unknown
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.