CVE-2026-53538

Katalog CVE

CVSS 3.7 · Low EPSS 0,26%

Kerentanan Interpretation Conflict pada fastapiexpert python-multipart. Skor CVSS 3.1 3.7 (Low) menurut github.com.

Deskripsi (NVD)

Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse (since the CVE-2021-23336 fix) treat only & as a separator. This creates a parser differential: the same bytes are tokenized into different fields than a WHATWG compliant intermediary would produce, allowing an attacker to smuggle extra form fields past an upstream body inspecting component. This vulnerability is fixed in 0.0.30.

Rincian

Terbit di NVD

22 Juni 2026

Terakhir diubah

26 Juni 2026

Status NVD

Analyzed

CVSS 3.1

3.7 (Low), sumber github.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-436: Interpretation Conflict
CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

EPSS (30 hari)

0,26% peluang dieksploitasi; lebih tinggi dari 15,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/Kludex/python-multipart/security/advisories/GHSA-6jv3-5f52-599m advisory vendor