CVE-2026-44899

Katalog CVE

CVSS 6.1 · Medium EPSS 0,27%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada mistune project mistune. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the Image directive plugin validates the :width: and :height: options with a regex compiled as _num_re = re.compile(r"^\d+(?:\.\d*)?"). When the validated value is not a plain integer, render_block_image() inserts it directly into a style="width:...;" or style="height:...;" attribute. Because the value was accepted by the prefix-only regex, any CSS after the leading digits reaches the style= attribute verbatim and without escaping. This vulnerability is fixed in 3.2.1.

Rincian

Terbit di NVD

26 Mei 2026

Terakhir diubah

24 Juli 2026

Status NVD

Analyzed

CVSS 3.1

6.1 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

EPSS (30 hari)

0,27% peluang dieksploitasi; lebih tinggi dari 18,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/lepture/mistune/security/advisories/GHSA-ccfx-mfmx-2fx9 exploit · advisory vendor
• https://github.com/lepture/mistune/releases/tag/v3.2.1 product · release notes