Path traversal in python-multipart - CVE-2026-24486
Published: January 26, 2026 / Updated: February 12, 2026
Vulnerability identifier: #VU122010
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-24486
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Marcelo Trylesinski
Affected software:
python-multipart
python-multipart
Detailed vulnerability description
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when using non-default configuration options "UPLOAD_DIR" and "UPLOAD_KEEP_FILENAME=True". A remote attacker can send a specially crafted HTTP request and write arbitrary files on the system.
How to mitigate CVE-2026-24486
Install updates from vendor's website.