CVE-2026-44898

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 github.com.

Deskripsi (NVD)

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, render_toc_ul() builds a <ul> table-of-contents tree from a list of (level, id, text) tuples. Both the id value (used as href="#<id>") and the text value (used as the visible link label) are inserted into <a> tags via a plain Python format string — with no HTML escaping applied to either value. When heading IDs are derived from user-supplied heading text (the standard use-case for readable slug anchors), an attacker can craft a heading whose text breaks out of the href="#..." attribute context, injecting arbitrary HTML tags including <script> blocks directly into the rendered TOC. 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 github.com
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-6269-cqxg-mhhv exploit · advisory vendor
• https://github.com/lepture/mistune/releases/tag/v3.2.1 product · release notes