CVE-2026-24486

HIGH 8.6

Python-Multipart has Arbitrary File Write via Non-Default Configuration

CVSS Score

8.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	kludex
Product	python-multipart
Published	Jan 27, 2026
Last Updated	Jun 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

Low

Affected Versions

Kludex / python-multipart

< 0.0.22

References

NVD ↗ CVE.org ↗ EPSS Data ↗