python-multipart: Python-Multipart is a streaming multipart parser for Python
CVE-2026-40347 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-40347, released April 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-multipart · Debian 14 | 0.0.26-1 | DEBIAN-CVE-2026-40347 | Apr 18, 2026 |
| python-python-multipart · sles 16.0 | 0.0.20-160000.4.1 | SUSE-SU-2026:21999-1 | May 29, 2026 |
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