CVE-2026-24486

Name	CVE-2026-24486
Description	Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1126557

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-multipart (PTS)	bullseye	0.0.5-2	vulnerable
	bookworm	0.0.5-3	vulnerable
	trixie	0.0.20-1	vulnerable
	forky, sid	0.0.20-1.1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-multipart	source	(unstable)	0.0.20-1.1			1126557

Notes

[trixie] - python-multipart <no-dsa> (Minor issue; will be fixed via point release)
[bookworm] - python-multipart <no-dsa> (Minor issue)
[bullseye] - python-multipart <postponed> (Minor issue)
https://github.com/Kludex/python-multipart/security/advisories/GHSA-wp53-j4wj-2cfg
Fixed by: https://github.com/Kludex/python-multipart/commit/9433f4bbc9652bdde82bbe380984e32f8cfc89c4 (0.0.22)
Followup for test: https://github.com/Kludex/python-multipart/commit/0fb59a9df0f273bfde99740b302ccb2ae45e2b8a (0.0.22)